AC Delco 41-962 spark plug crate 350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**skokie** · 09-20-2025, 02:35 AM

Hello!

I have a crate 350 or target master engine in my 68 C10 and its time for a spark plug change. I was looking in my tool box and I found 2 4 pack boxes of AC Delco 41-962. Think I bought these by mistake for my 01 Sierra but I went to Iridium plugs. Would this plug work in the crate 350? Its currently running autolite 25s now.

Thanks

**mr48chev** · 09-20-2025, 04:46 AM

The "compatibility chart on O'REiilly's site https://www.oreillyauto.com/detail/c...lug/acd2/41962 doesn't show it to fit regular small blocks.

Looking up a 90 C 10 that is about what those target motors are based on It takes a 41-803 style plug. Best thing is pull an old one out and replace them with the same number or one that crosses over from it if you have a brand preference.

**skokie** · 09-20-2025, 04:28 PM

Thank you SIR!! I need to go to Oreillys to pick up belts for the truck. Will find out about the plugs. Going out to the truck now and pull #1.

Take care

Quote:

Originally Posted by mr48chev

The "compatibility chart on O'REiilly's site https://www.oreillyauto.com/detail/c...lug/acd2/41962 doesn't show it to fit regular small blocks.

Looking up a 90 C 10 that is about what those target motors are based on It takes a 41-803 style plug. Best thing is pull an old one out and replace them with the same number or one that crosses over from it if you have a brand preference.

**skokie** · 09-20-2025, 04:50 PM

Here is a pic of the Autolite 25 next to the AC Delco 41-817. Threads look the same but the 41-817 is about a quart inch longer.

**skokie** · 09-20-2025, 05:43 PM

Just got back from Oreillys. The AC Delco 41-817 came up as a plug for the 350. Thanks!

09-20-2025, 04:46 AM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 16,395	Re: AC Delco 41-962 spark plug crate 350 The "compatibility chart on O'REiilly's site https://www.oreillyauto.com/detail/c...lug/acd2/41962 doesn't show it to fit regular small blocks. Looking up a 90 C 10 that is about what those target motors are based on It takes a 41-803 style plug. Best thing is pull an old one out and replace them with the same number or one that crosses over from it if you have a brand preference. Attached Images __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

09-20-2025, 04:50 PM	#4
skokie Senior Member Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,387	Re: AC Delco 41-962 spark plug crate 350 Here is a pic of the Autolite 25 next to the AC Delco 41-817. Threads look the same but the 41-817 is about a quart inch longer. Attached Images __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

09-20-2025, 05:43 PM	#5
skokie Senior Member Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,387	Re: AC Delco 41-962 spark plug crate 350 Just got back from Oreillys. The AC Delco 41-817 came up as a plug for the 350. Thanks! __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

09-20-2025, 02:35 AM	#1
skokie Senior Member Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,387	AC Delco 41-962 spark plug crate 350 Hello! I have a crate 350 or target master engine in my 68 C10 and its time for a spark plug change. I was looking in my tool box and I found 2 4 pack boxes of AC Delco 41-962. Think I bought these by mistake for my 01 Sierra but I went to Iridium plugs. Would this plug work in the crate 350? Its currently running autolite 25s now. Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234



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