Originally Posted by lmchevy

I was wondering if the Moroso blueprinted oil pump #22162 has more clearance (crank and rod to oil pump) than the stock Melling # M77HV for 4.750 stroke chevy big blocks.I know about all the better oil pumps and am just wanting to know between these two in particular.I have heard that sometimes on the M77HV that you may have to grind on it to gain clearance but what about the Moroso pump.Thanks