When HEI first came out Chevy used the .060 gap plugs. We experienced some frustrating damp weather starting problems. They changed the specks to .045 & it solved the problem. They seamed to work OK on Buicks & olds.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne Super In the Gallery Forum