Yes I found I had to angle the supply hole slightly and it sits between ribs. Remember, you are blocking the supply to the oil galley in the block between the pump and galley, it takes a long 1/8" npt tap that I had problems locating to go up in the block to add the plug. Large 3/8 npt tap is to supply enough oil volumn to filter and back to oil galley. I got my lines filter base etc. fom Speedway motors. Had to go to a machine shop supply & order the long tap. I would think you could enlarge any existing galley hole for the return. Good luck with yours Zeke

The Amish Connection
51 Chevy 1/2 ton 5 window,Vortec hotrod, no horse