I have never before seen rod and main bearings the same size but on my z6they are. First off when i got the engine the engine stamp on the front of the motor had been ground off but the block on the bottom by the oil pan says p08 as a z6 should but when orielys got my bearings the mains were about 1/4in too big. Whats the deal? HELP! Also a bit of info the rod bearings fit into the main journals just fine.