360 11.5:1 pistons

rumblefish360 said

Then it’s this one below, correct?
View attachment 1715895999

The dome fits? I have smaller some slugs that barley squeak in. I do not see that dome fitting. I’ve also not held them in my hand ether.

View attachment 1715895997 View attachment 1715895998

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Yep, the dome will for W5’s. You just have to mill the quench pad down to zero deck if you had it above the deck to start with.

I should have mentioned that you have to make sure that you understand when you mill that quench pad off you are effectively putting the dome that many thousandths into the chamber. That raises the compression quite a bit.

I know because I was shooting for 13.5:1 and milled .020 off the pad and ended up at 14.8 or something.