Originally Posted by wirewizards
they broke the rear main seal

PLEASE tell me you don't mean they broke the cast iron rear main cap! Unless you're VERY lucky, they just ruined the engine! Swapping main caps is a problematic, if not impossible job, as finding a cap that can be bored to fit the block is extremely difficult. When the engine was originally manufactured, the block and caps were assembled, then the holes were line-bored. Manufacturing tolerances between blocks make it very hard to use a cap from another block, even if the line-boring is redone. Somebody owes you an engine.
Jerry

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