Spark plugs

[Huckleberry]

Hey everyone, what's the best spark plug for a 350 crate motor. " bone stock" daily driver, please advise on plug gap. Thanks in advance

 

[Memaloose]

1978 Chev 350 factory gap is .035"

 

[DoubleDingo]

ACDELCO. Gap is .045 with HEI if I recall correctly, and .035 with points. Go to the local auto parts store, rock auto, or whatever, plug in your truck's info and get the ACDELCO plug for that application. Not the fancy iridium or platinum, just the plain-jane copper plugs.

 

[Bextreme04]

It will be an ACDelco R45TS. That was the specified plug for almost every small block(and some big block) GM engine for decades. My 71 Buick 455 uses the same plugs.

 

[Huckleberry]

Thanks everyone. Appreciate you all.