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Recommended Spark Plugs

20streetrod06

Full Member
Joined
Oct 7, 2020
Messages
273
Location
Central IL
Im sure this has been discussed, as i know its not a new issue, but i could not find what i was after in the search bar.

the owners manual for mine states 41-974 AC Delco plugs w/ .060 gap. from everything i can find, those plugs are not available.

i can find nuggets of info saying that chevy made a move to .040 gap on a TSB, but cant find a copy of said TSB.

my truck isnt a hot rod, its just my daily driver, and has not done any towing since i got it, what is the general consensus of which plugs are the preferred option for these older 5.3's?
 
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