Help!
Alright guys I am trying to tune-up my 81 vette but the emissions control label is too faded for me to read the spark plug gap setting. Anyone know what this should be? I have ACDELCO rapid fire platinum plugs
Thanks Guys

 

Welcome to the forum.

0.035" for non-HEI

0.045" for HEI

 

Thanks a bunch but how do I tell if I have a HEI or not?

 

The distributor is larger. Corvettes started using them in 1975.

 

Thanks for the comments