Best way to break in rings is with pressure. I broke my 347 in with 10lbs of boost and I would do it again. Now I have a 347 that uses no oil and a set of rings that seated great.
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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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