57 Bel Air Rear Main Seal Shim - 283 Block
thingiverse
The 57 Chevy Belair 283 cu 4.6L usually has a rope seal for the rear main crankshaft seal. Aftermarket suppliers offer a rubber seal that needs to be shimmed. This is the exact shim needed. I printed this in PLA at 90% infill. I would not recommend less than 80% infill.
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