327 BASED eng. (4.000 bore x 3.250 Stroke) press pin, coated skirt. Pistons sold in sets of 8, price shown is each.
Ring dimensions 5/64, 5/64, 3/16Flat Top; 2 valve reliefsCompression dist 1.675Deck Clearance .025Skirt Clearance .0010
Compression ratio by CYL head CC
Part number
CID
58.0cc
64.cc
68.cc
72.cc
76.cc
H660CP
327
9.66
9.39
9.04
8.67
8.33
H660CP20
330
9.74
9.47
9.11
8.74
8.40
H660CP30
332
9.79
9.51
9.15
8.78
8.44
H660CP40
333
9.83
9.55
9.19
8.82
8.47
H660CP60
337
9.91
9.63
9.27
8.89
8.54