Depends on the crate motor builder. Some rebuilders who sell to local parts houses use the cheapest parts available so the warranty is worthless if you have to change it a few times. Most builders start with used blocks and cranks, so If you don't pull one apart to check, you could be in the same boat you are now with way oversized bores or undersized crank.
The only way I would buy a crate motor is with paper work to show all new parts were used and a parts list with part numbers and who's parts they are.
Joe
