I have been having problems with my 350, I lose oil pressure after about 15 minutes of driving. Im going to have it tested with a mechanical oil pressure guage to see if it is a simple fix(hopefully)

My real question is if I have my engine disassembled would 383 parts from the late 70's early 80's fit in a 383 setup on a lt1. ie. crank, pistons...

I also have a lt1 from a 97 camaro complete with wiring harness and ecu

If anyone could give me insight into which would be best for the cost and preferably the cheapest that would be much appreciated

Thanks in advanced,
Chris