Use eigher a KB162 piston or a 2316 Federal mogul/TRW to keep your compression height correct. Anything less than these are a waist of money and super-low compression. Even with these pistons and an 85CC or so head, your barely at 9:1.
Follow the link on a Purestock 383 thread.
NEITHER of these pistons will get you the CORRECT compression height , the KB162 is deeper in the hole than the 2315 AND it's got a CANYON LIKE valve relief at 5cc .
