Building A Budget 347 Engine One Peice Rear Main Seal
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Ford began using a one-piece rear main seal in 1982 on 5.0L (302ci) engines to prevent leakage. Your machine shop can convert your classic 289/302 small-block Ford to one-piece rear main seal, which involves machining both crankshaft and block, but it is money well spent in leak prevention. View Related Article
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