Hey I was just installing the oil pump on my rear main cap by torquing it down and all of a sudden the hole for the bolt cracks around the top and breaks off down a few threads, looking like a crater around the hole for the bolt. I was wondering where I could get a just a rear main cap or do I have to order all of them. Also I paired up my 350 main cap, though it looks the same, the lower bearing doesn't fit. Is there supposed to be a difference? Any suggestions to remedy the problem.