Did a search with no answers. Small block chevy with a fresh rebuild. New full rebuild with Howards retro roller cam, pushrods, heads, ect. New distributor and oil pump of course. Only used parts are the block and crank. the machine shop ran it at on the stand for an hour with no issues. So after a few weeks to get it in the car and about two hours drive I started to hear noises. Thinking it was a new fan belt and pulleys I wasn't concerned but became louder and a squeal. Pulled the belt to disable the pump alt. and fan. Noise worse, after pulling the valve covers I found two broken roller rocker pins were coming out of the lifters, pulled and replaced rockers with a better set my builder supplied. I didn't find much oil but some, now the bad noise is still there. I have good oil pressure on the gauge but no oil to the heads on either side. Nothing through any pushrods or lifters. My builder has a good reputation and says will do whatever to make right. I hate the idea of pulling this motor. any ideas? simple fix I hope?