above deck ?

... provided you do a lot of checking and special machining of the chamber roof and the pistons. I did one and wouldn't do another unless it was forced. Just my opinion but the potential benfits aren't worth the $$ if you're paying to have it done.

I don't disagree. I was merely pointing out that quench pistons ARE made. Almost worth building a Chevy instead of all the trouble if you're just dying to have quench.