There is no issue with the 347 vs the 331. Machine work and assembley is the concern for a long life. A 302,306,327,331,342,347, etc... will all last the same in the same hp applacations. This is a myth that has been started and will not die!!!
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79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor
93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe
Ricer hater's club member #49
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