I have built a 4.9 liter (4.6 block) Rover engine with Buick 300 heads and lots of trick parts. I had the oil transfer passage in the block drilled to 5/8 inch and ported the "intermediate" front cover that is set up for a distributor. I'm now worried about internet stories of this crank driven oil failures. Should I go to the trouble of buying a new cover/pump or switch to the older distributor/cam driven oil pump from a company like TA Performance? I've got lots of oil pressure in my other engine with the TA cover. Does anyone have experience with this serpentine type of oil pump?