Hi Jay,
Yea it was starting to worry me. I am cutting and pasting these numbers directly off of the websites in which I purchased.
Robert Pond Block:
"Our SOHC Ford blocks are manufactured in both
aluminum and cast iron. The specifics are the
same as our wedge block, except they weigh 2 to 3
pounds more due to no lifter provisions and have a
deck height of 10.170 instead of 10.155. Also, there are
no oil passages in the lifter valley area. However,
there is an oil return hole in the back of the block
that is unique to the SOHC head."
From Pistons (Diamond):
• Designed to fit OEM 427 S.O.H.C. Hemi engines
• Made from 2618 alloy for street/strip use
•
Compression ratios calculated at 0.011” to 0.015” bore depth with 10.170” deck height• Premium 8620 material wrist pins
• Gasket volume: 10.1cc’s
• Top ring down dimension: 0.480”
• Standard ring package: 1/16” x 1/16” x 3/16”
• Valve relief depth: 0.301” intake and 0.142” exhaust
Bore Stroke Rod C.D. Weight PIN CC's Compression Ratio (98cc) 4.250 4.250 6.700 1.330 call .990 x 2.930 12.9cc 10.8 to 1
Racedyne (Cams spec card):
Cam Specs
Factory:Lift; Intake .433 Exhaust .430
Duration, seat to seat; Intake258 Exhaust 258
Lobe Separation; 108
OK so (Please catch me if I am wrong) the Robert Pond block has a deck height of 10.170". The Piston's I ordered from Diamond say that "Compression ratios calculated at 0.011” to 0.015” bore depth with 10.170” deck height" (so it seems these pistons were made with the assumption that the deck height was 10.170"
And the cam specs are a cut and past from Racedynes website. Please tell me what's wrong here. From what I see, it would seem that the deck should NOT be milled down to 10.155 (Due to the pistons ordered?)