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Big Mutha' Thumpr 243/257 Hydraulic Roller for Pontiac 265-455. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle. Distributor Gear upgrade required.
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Pontiac 265-455 V8
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