Stock deck height is .020 Bore 4.12 Stroke 3.75 Chambers 87 cc Piston valve reliefs 6.7 cc
Accounting only for standard bore, compression in 8.68 to 1 with 64 heads
With the small valve 350 #17 heads you have, the same calculator shows 9.94 to 1.
Unless I misread, you mentioned you wanted 9.5 to 1...I merely stated that unnecessarily spending money milling the bejesus out of perfectly good heads...that for a few hundred more..the E heads would be a perfect solution. $1000 for 64 heads and $1200 for money not spent on properly machining and building 64s to achieve your desired 9.5 to .
