SMALL BLOCK CHEVY 21? FLAT TOP Gasported / Asymmetrical Valve Pockets PowerPak Plus 381cid 4.165 x 1.125CH, 3.500stroke,6.125rod,0.927pin,-8.9cc,450g,12.7CR, 2618.
SMALL BLOCK CHEVY INVERTED DOME for the 4.3L Turbo Syclone and Typhoon 268cid 4.040 x 1.550CH, 3.480/3.500stroke,5.700rod,0.927pin,-20.0cc,486g,8.9CR, 4032.
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