KB280 with the 440 rod, but the quench pads *will* need to be milled.

Quote:

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Closed chamber head , KB piston shouldn't even be an option , plus you don't need a quench dome with a closed chamber head

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You do if you are using a thick head gasket and want to maintain quench and the right CR... also Eagle H-beams are something like .008 shorter than the stock 440 rod length, and the KB280 sits .010 down in the hole to allow for decking the block.

With the H-beams the piston flat should be .018 down the hole - and I did actually measure and confirm this. So I had my quench domes milled down to .030 high.

Using a .051 thick head gasket, that means the dome has a positive deck height (sticks out above the block) .012", resulting in a .039 quench distance.

CR calculated out to 10.4:1 after I cc'ed my chambers.

Measure twice, cut once!
-Charles