360 rings. gapless?

I have never used the gapless rings but from what I have read they are only useful if you are trying to squeeze the last couple of HP out of an engine. Certainly don't need them if your goal is 350-400HP. I am using Sealed Power Moly rings in my engine.

What you wind up for compression with the KB107's is totally a function of what machining you have done to the block, what heads and what machining you have done to the heads. I have KB107's in my 360 and the block is machined for zero deck and I have magnum heads with 64cc chambers. With a Fel-Pro head gasket that has a 4.180 bore and a compressed thickness of 0.039 I have 10.6:1 compression.