well after putting in yet another set of bearings- short story ,

bought a forged ls2-370 boost motor- bearings didn't last the tuning part- pulled the pan and turned the crank 10 and put in new main /rod bearings, well got done tuning and brought it to the track- 2 passed- 9.7's and lost oil pressure again - well maybe I caught it sooner but the thrust bearing and 2/4main bearing are shot- copper everywhere. clearance was set at .0015 , not sure what might be the problem, I see in ls build manuals to hit the crank and "seat" the thrust bearings- I never did that--problem??? said to hit it in the forward direction last- any advice??? has arp main studs- I assume it was line honed- second it in a vette with a th400 conversion- could the driveshaft be driving it forward? the reast of the rod/amin bearing look ok-ie no copper but scarred