I think i broke rear main bearing

I have always bored my SB rear main hole out to 1/2 inch and then taper it some and do the same to the NEW oil pump. I do use the paper gasket but spray CooperKote sealant on both sides.

I then use a flat plate with emory cloth and WD40 to lightly dress the oil pump and caps mating surface. I do lazy 8's making sure I keep them square.

Most pumps will clear a factory main cap bolt, even the HV ones. But they will hit most cap studs like ARP's