1st 318 rebuild

Sireland67 is spot on about the ring gap. if you order KB pistons, file fit the top rings to EXACTLY what they recommend for your bore size.

There's a formula to calculate it, it comes with the pistons and is relevant to the bore size and type of engine application ie drag, tow, street, circle track.

in any case, the top gaps are larger than most other cast or hypereutectic top rings gaps, but it's critical to get it right for engine longevity.

If you pay someone to assemble it, they NEED to know how important this is.