Did you use a new pick up in the oil pump? I have seen them fall out on chevy engines. If you welded the new pick up on the pump with out dissasembling the bypass spring then the spring is ruined from the heat. What are the crank bearing clearances at? I have also seen cam bearing on a small block chevy installed wrong and cause oil pressure to go crazy. Thats why they are numbered 1 thru 5. Not all cam bores are the same size on small blocks.
|