I run a melling HV with a hardend shaft. A deep sump pan at least 7qts is needed for a HV. Or you will suck it dry and lose prime then you will be in deeeeeeeep poopies. As far as bolting one in you won't have any issues unless your running a main girdle. If you are, get out your damn grinder, I had to grind down the stud that sits up against the pump and a little on the pump itself.