Just curious if anyone has ever seen this before. After getting my crank back from the grinder and attempting to drop it into the block...it wouldn't go in. I thought maybe he made a mistake as I was cutting a 312 crank to fit a 292 block and offset grinding the stroke to 3.500". When I brought it back he said he couldn't understand why it wouldn't drop in, so we tried it in another block he had in the back and wouldn't you know it, it dropped right in! In looking at the block he had in the shop I knew immediately the receiver groove for the oil slinger was not the same as my block, so I went home to investigate and here is what I found.....