Alright guys I have lt1 355 balanced bottom end and all clearances were checked the mains were .002 and rods were .0015 and i used a new gm stock flow oil pump. the only bearings I didn't check were the new cam bearings. "Paid local shop to install them" May have been a mistake. it has a llloyd Elliot cam 226/230. .575 lift with patriot springs 155lb seat pressure well after I built it and ran about 200miles I thought I had a lifter problem then it turns out I had something else. I tore the engine down and found the bearings are all chewed up in the bottom end. I did have oil to the top end and at first had about 60psi cold and about 25 hot idle. but that soon chanced to about 60 cold and about 10-15psi hot. I did notice that the cam bearing were all clocked wrong most are with the oil holes lined up at 6oclock could this cause loss of oil pressure to the mains and rods? What is really odd the mains #'s 2,3,4 were damaged the most. 1&5 had damage but not as bad. Rods varied through out no real pattern any ideas on what might have went wrong will be a big help. The oil pump acted as if it would suck the pan dry at times like it had an internal leak.. I watched the pressure drop while cruising down the highway @ 2300rpm and come back. Any ideas would be a big help guys?