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i will have yo look at that 1 .will give quench also?
http://kb-silvolite.com/performance.php?action=details&P_id=26
that piston only has .140 dome and .075 in the hole and the other is .090 and .200 dome and maybe more V/P clearence.

the kb catalog states that the 278 will need the domes machined. i use 184's in both my 440's.