Pontiac 455. 4.150" bore x 4.210" stroke. Crank centerline to deck 10.250". Rod length 6.630". KB hyper #KB222 piston compression height 1.500", 6 cc's of valve eyebrow. With a stock deck block, the piston would be down in the bore 0.015" at TDC. With KB222, static compression ratio would be 8.5 with a 111 cc chamber, 9.5 with a 96 cc chamber and 10.3 with a 87 cc chamber. Buy yourself a burrette and check the heads yourself. Here's a paper I wrote to help you...........
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