So i have a car that I bought from a guy who said the engine was rebuilt. They used a felpro headgasket which promptly blew out and kept running it and trashed the bearings. I get in the bottom end and pull the bearings and stamped on the main bearings is the part number MS 2863P ..... Immediately caught my attention because the clevite bearings I've seen always are 1533P. So I looked up the part number. Comes up with Ford Big Block main bearing set... Does anyone know if they are the same thing as the chrysler bearings. It wouldn't be far fetched that a manufacture recycled an old part number and designed the crank around a set of pre-existing bearings but I can't find anything that says they cross or are interchangeable. The Main Journal diameter for the Fords seems to be 2.749 from what I can find online which is way bigger than ours are. Maybe just a misprint? Anyone have a set of bearings laying around they can check?