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- - spark plug question (https://67-72chevytrucks.com/vboard/showthread.php?t=402148)

meyer4589

05-11-2010 04:27 PM

spark plug question

I'm planning on a tune up for the 250 in my truck, and I was wondering if the brand new AC Delco 41-629 plugs I have laying around would work or would it be better if I just go out and buy a different set

Fastest32

11-12-2014 08:25 PM

Re: spark plug question

What did you figure out on this? I'm in the exact situation.

Wrenchbender Ret

11-12-2014 10:53 PM

Re: spark plug question

I,m not familiar with that numbering system. The early 250 engines used a long reach plug with a gasket. The later ones had the standard thread length & a tapered seat.

Fastest32

11-13-2014 07:44 AM

Re: spark plug question

Yeah I'm just gonna buy new ones. I don't know where those ac delco ones came from but I have 6 brand new ones. The threads are almost twice as long though.

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