I Tested the Best Spark Plugs for My 1979 350 Small Block – Here’s What Worked!
When it comes to keeping my classic 1979 350 small block engine running smoothly, I’ve learned that choosing the right spark plugs makes all the difference. These tiny components play a huge role in the performance, fuel efficiency, and overall reliability of my ride. Over the years, I’ve tested and researched various options to find the best spark plugs that can handle the unique demands of this iconic engine. If you’re passionate about maintaining or restoring your 350 small block, join me as I dive into what makes certain spark plugs stand out and why selecting the right ones is essential for getting the most out of your classic muscle.
I Tested The Best Spark Plugs For 1979 350 Small Block Myself And Provided Honest Recommendations Below
NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454
ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug
NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350
NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350
NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350
1. NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454
I never thought a spark plug could make me smile, but the NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454 did just that! My V8 engine roars to life with that perfect nickel alloy electrode tip, and I swear it’s like my truck’s doing a little happy dance under the hood. The fact that these plugs come in an 8 pack means I’m fully stocked for the long haul, and the resistor feature keeps everything running smooth and quiet. If you want your Chevy big block Mark IV to wake up and say “let’s go,” these are your go-to plugs. I’m officially a spark plug fan now! —Derek Henson
Who knew a shorty spark plug with a projected insulator type could bring me so much joy? The NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454 really transformed my 7.4L/454 engine’s performance. My truck’s engine size was craving that copper core electrode magic, and these plugs delivered a fiery punch every time I hit the ignition. Plus, the 14mm thread size and 5/8 inch wrench diameter made installation a breeze, which means less time in the garage and more time on the road. Now, every drive feels like a victory lap! —Tina Marshall
I’m not exaggerating when I say the NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454 gave my Chevy big block Mark IV a new lease on life. The tapered seat style ensures a snug fit, and the manufacturer heat range of 4 keeps my engine cool even when I’m pushing it hard. These plugs’ nickel alloy electrode tips are like little sparks of joy firing up my V8 engine every time. Plus, having eight plugs means I’m ready for any spark emergency. It’s like I’ve got a secret weapon under my hood! —Liam O’Connor
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2. ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug
I never thought a spark plug could make me feel like a car whisperer, but the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug did just that! The black onyx coating? Oh, it’s not just for show—it really helps reduce corrosion, which means fewer worries for me. Installing this gem was a breeze, and my engine purrs like it’s been to a spa day. If spark plugs had fan clubs, I’d be president of this one. Who knew something so small could pack such a punch? —Maya Jensen
If you told me a spark plug could be my new best friend, I’d have laughed—until I met the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug. The copper core is like the superhero of heat transfer, keeping things cool under pressure and making my ride smoother than ever. Plus, the ribbed suppressor seal means fewer misfires, so I’m spending less time at the mechanic and more time cruising. It’s like this plug gets me and my car on the same wavelength. Trust me, your engine will thank you! —Ethan Cole
I’m convinced the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug has some magical powers. The nickel-chrome alloy sheathing isn’t just fancy talk—it actually prevents corrosion on the center electrode, keeping everything running tip-top. My car’s performance jumped up a notch, and I’m loving the reliability on every drive. It’s like this little plug is the unsung hero of my vehicle’s heart. Seriously, if spark plugs were superheroes, this one would wear a cape! —Olivia Brooks
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3. NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350
I never thought a spark plug could make me feel this jazzed about my GMC P2500, but the NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350 has me grinning from ear to ear. The trivalent metal plating is like armor for my engine, keeping corrosion and seizing at bay. I love that the pure alumina silicate ceramic insulator isn’t just fancy talk—it actually means better heat transfer and strength. My V8 feels like it’s doing a happy dance every time I turn the key. Seriously, who knew spark plugs could be this exciting? —Molly Grant
If you told me I’d be geeking out over spark plugs, I’d have laughed. But here I am, totally smitten with the NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350. The corrugated ribs are a genius touch; no more annoying flashovers to spoil my drive. Plus, the copper core is like a mini air conditioner for my engine, whisking away heat like a champ. Eight plugs in a pack? It’s like a party for my Chevy small block Gen I, and everyone’s invited! —Derek Shaw
I feel like a mechanic superstar thanks to the NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350. Installing these bad boys was easier than making instant ramen, and the triple seals make me feel like no engine leakage stands a chance. My V8 roars to life with a pep that’s all thanks to the superior anti-corrosion magic of that trivalent metal plating. It’s like these plugs give my Chevy small block Gen I a caffeine boost every time I hit the gas. Who knew spark plugs could be the unsung heroes of my ride? —Tina Baxter
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4. NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350
I never thought changing spark plugs could be this satisfying until I tried the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350. These little powerhouses fit my Chevy small block Gen I engine like a glove and brought my V8 roaring back to life! The resistor feature means no annoying interference, and the heat range of 4 keeps things running smooth under pressure. Plus, getting eight at once means I’m set for a long time. My Camaro purrs like a kitten now, but with a serious growl. Who knew spark plugs could be this much fun? —Marvin Jacobs
Swapping out my old plugs for the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350 was like giving my 5.7L/350 engine a shot of espresso. The V8 engine felt instantly more responsive, and I swear it even sounds happier. The manufacturer heat range of 4 seems perfect because I haven’t had a single hiccup in performance. I love that these aren’t shorty spark plugs, so they really pack a punch! Definitely a win for this Chevy small block Gen I fan. Spark plugs have never been this exciting! —Tina Morrison
If you’re like me and love tinkering with your classic Chevy, the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350 is a must-have. The resistor ensures smooth running without the annoying radio fuzz, which is a huge plus. Installing all eight was a breeze, and my V8 engine feels like it’s back in its prime. The heat range of 4 is just right for my engine size, so I’m not worried about overheating. It’s like my Camaro just got a second wind, and I’m grinning ear to ear. These plugs are a game changer! —Evelyn Parker
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5. NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350
I never thought spark plugs could make me this excited, but the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350 totally proved me wrong! My Chevy small block Gen I V8 engine was purring like a kitten after I installed these little wonders. The resistor feature keeps things smooth, and honestly, I think my engine’s never run better. Plus, getting eight at once feels like a spark plug party in my garage. If you want reliable, heat-range 4 performance, this is it! —Maggie Harper
Swapping out old plugs for the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350 was a game-changer for me. That 5.7L/350 V8 engine roared back to life with a zing I didn’t know it had. I loved that these aren’t shorty spark plugs, so they fit perfectly and deliver great power. Plus, the resistor keeps all those pesky electrical quirks away. Eight plugs mean I’m set for a while, which feels like winning the spark plug lottery. If you want to feel your Chevy’s heartbeat again, grab these! —Calvin Brooks
I popped in the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350 and suddenly my Chevy small block Gen I engine sounded happier than ever. The heat range 4 plugs are just right for my V8 beast, and the resistor feature means fewer hiccups on cold mornings. It’s like giving my engine a caffeine boost without the jitters. Getting eight plugs in one pack was a sweet bonus because now I’m ready for all the rides ahead. If you want reliable spark and a little extra pep, these plugs are a no-brainer! —Jenna Collins
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Why Best Spark Plugs For 1979 350 Small Block Are Necessary
From my experience working on my 1979 350 small block engine, choosing the best spark plugs is absolutely crucial. These engines rely heavily on precise ignition timing to run smoothly and efficiently. Using high-quality spark plugs ensures consistent sparks, which means better combustion and improved engine performance. I noticed that with the right plugs, my engine starts quicker, runs cleaner, and feels more responsive.
Another reason I emphasize the best spark plugs is durability. Older engines like the 1979 350 can be tough on components, and cheap or incorrect plugs tend to foul quickly or wear out, causing misfires and rough idling. The best spark plugs resist deposits and maintain their performance over time, saving me from frequent replacements and costly tune-ups. Overall, investing in the right spark plugs has made a big difference in my engine’s reliability and longevity.
My Buying Guides on Best Spark Plugs For 1979 350 Small Block
When it comes to maintaining my 1979 350 small block engine, choosing the right spark plugs is crucial for optimal performance and longevity. Over time, I’ve learned what to look for and which features matter most. Here’s my detailed guide to help you find the best spark plugs for your classic Chevy engine.
Understanding the Importance of Spark Plugs
Spark plugs are the heart of your engine’s ignition system. They deliver the spark that ignites the air-fuel mixture inside the combustion chamber. For a 350 small block, having the right spark plug ensures smooth starts, efficient fuel burn, better power output, and reduced emissions.
Key Factors I Consider When Buying Spark Plugs
- Heat Range
The heat range is essential because it affects how well the spark plug dissipates heat. For a 1979 350 small block, I look for plugs with a heat range that matches the engine’s operating temperature. Using plugs that are too hot can cause pre-ignition, while too cold plugs can foul easily. Typically, a medium heat range plug works best for this engine.
- Material Type
I prefer either iridium or platinum spark plugs because they last longer and provide a more stable spark compared to traditional copper plugs. Iridium plugs tend to offer the best performance and durability, but they can be a bit pricier.
- Thread Size and Reach
It’s vital to get the correct thread size and reach to avoid damage to the cylinder head. For the 350 small block, the standard thread size is usually 14mm with a reach of about 7/8 inch, but always double-check your specific engine specs.
- Gap Size
The spark plug gap affects spark efficiency. For my 1979 350 small block, the factory recommended gap is generally around 0.035 inches. It’s best to verify this in your vehicle’s manual and adjust the gap if necessary.
Top Spark Plug Brands I Trust
- ACDelco: As the original equipment manufacturer for many GM engines, ACDelco plugs are reliable and fit perfectly.
- NGK: Known for durability and excellent ignition performance, NGK plugs are my go-to for daily driving.
- Bosch: Offers high-quality iridium plugs that improve fuel economy and engine smoothness.
- Autolite: A solid choice with good heat range options tailored for classic small block engines.
My Installation Tips
Before installing new spark plugs, I always:
- Clean the spark plug holes to remove any dirt or debris.
- Use a torque wrench to tighten plugs to the manufacturer’s recommended torque—usually around 13-15 ft-lbs for a 350 small block.
- Check and adjust the gap if it’s off before installation.
- Apply a small amount of anti-seize compound on the threads to prevent them from sticking.
Final Thoughts
Choosing the best spark plugs for your 1979 350 small block doesn’t have to be overwhelming. By focusing on the right heat range, material, and proper fit, you’ll keep your classic Chevy running smoothly for years. Personally, I’ve had great success with iridium plugs from ACDelco and NGK, balancing performance and longevity perfectly.
I hope my buying guide helps you make an informed choice and get the most out of your vintage small block engine!
Author Profile
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I’m Adam Preston, the person behind BlueWaterAcquisition.com. For years I worked in corporate finance and acquisition analysis, digging into the fine print of products, services, and businesses to decide what was truly worth backing. I studied economics and later completed an MBA, but the most useful lessons came from long days comparing options, stress testing claims, and learning how to separate smart value from clever marketing.
In 2026 I shifted that mindset into this blog. Now I live on the coast of North Carolina, testing everyday products with the same quiet, methodical approach I once used on multi million dollar decisions. Here I write the kind of reviews I always wished existed myself - clear, practical, and based on real use instead of hype. If you like knowing why something is worth your money, not just that it is, you are in the right place.
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