Hey rose, Tom Hoover told us that about 3/8" was what to shoot for on a hemi back in the day.
A stock hemi would pump a qt. a second at drag racing revs. I have always done it that way and never had an oiling problem chevy or mopar. I think Bill Jenkins said the same thing in one of his sbc books. In a touching the pan situation, the pump will pump more than can get in to the pick up , (vortech). I run a good 3/8" on my milodon single line too , as the hi volume pump will pump the same thing on a 440/505 as a hemi..
The pick up was et at 1/2" on the old funny car that I got the oil pan and system off of, I ran it that way for a while and ended up changing it to 3/8".?????????????????????????????????????????????
