Hi everyone,
I just got done rebuilding the oil pump and checking the main and rod bearings and here are the results:
Checked rod looseness with a dial indicator and all looked well ( only .0015 movement). Pulled off 1 rod and 3 main caps (not the thrust bearing one) and all looked good. Put in new pressure relief piston, spring,sprocket, o-ring fram oil filter with check valve and 10w40 oil. Had to do a light hone on the pressure relief bore with 600 emery to get piston to move freely. Had to shim pump so chain would not hit it. Also cleaned pump pick up. Motor now starts without knocking and. Oil light goes out in under a second. I was able to Pull the pan with the motor in car but had to jack it up about 1-1/4" and remove the sprocket then dropped the pump into pan before it would pull out or go back in. Putting the pump back in with the new o ring was Challenging but after tearing 2 O-rings went from oil lube to grease and just went 1/4 turn on the bolts and wiggining the tube until it popped in (glad I ordered 4 o-rings)! Used blue loc tite on the sprocket nut.
Hope my experience helps someone else with simular problems!
Frank