Join Date: Jun 2001
Location: austin, TX, 78704
do a search on hear about HV vs standard volume pumps, and you will probably consider the melling piece you have overkill. There are issues w/ hp loss, excessive pressures, sucking the stock pan dry.
This is not my experience, but alot of people have had alot of say on these threads.
I've never done business w/ him, but everyone speaks so highly of, it's worth mentioning that even Ed Curtis backs the stock replacement, I believe he makes a modification to it, but it's not a high volume or high pressure.
I say don't cut, and get a standard melling pump.
It's already been answered, but the reason for the lock on the drive shaft is so that when you pull your distributor out, it doesn't pull the oil pump shaft out of it's seat in the pump.