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  1. Naturally Aspirated - Uratchko Racing Engines
    I have a 1984 Chevy K20, SM 465 4 speed tranny, 4.56 gears and 35s. Our class rules are 412 CI small block, Dual Plane intake, Cast iron heads.. I have a 412 right now at about 13.5:1 compression, .30 over, 3.8 stroke, 5.7 rods. It has Dart Iron Eagle 215 heads with 2.05 valves, a Lunati Voodoo...