Careful of the HV oil pumps unless you have a 7-12 quart oil pan you can starve the crank for oil as it pushes all the oil up top and takes a few sec to drain back into the pan. I've had this happen on a few engines with stock 5-6 quart pans and after regrinding the crank installing new bearings and a stock pump it didn't happen again.One 350 we thought it was the line bore and had it machined after it took out the crank 3 times till the machinist asked if we were using a HV Pump.