I am trying to put a small block chevy 350 back together and the rear main bearing seems to be wrong. It does not fit over the crank. The crank is ground .010 under and the bearings match in this respect. The thrust surfaces of the bearing do not fit into the crank. The old bearing and the new bearing have the same part number stamped in the back 32020-cp. The casting number on the crank is 932442. Measuring across the bearings there was about .020 difference between the old bearing and the new bearing, with the new bearing being the larger of the two, which I am sure is the problem. I took back the first set of bearings thinking it was a defect and the new bearings have the same problem. From what I can tell from the numbers I think this is a 1975 motor. Are there different types of bearings for this? The bearing brand I am using is Federal Mogul. If anyone has any suggestions I would love to hear them.

Thank you,

Josh