I have a 67 b-body with a 440 that I am running a holley Red pump only. I believe it is regulated at about 5 psi. I have read about return lines and i think I am going to put one in, am I right in thinking a fuel filter with a vapor outlet plumbed back to the tank will do the trick? A few years back I installed a new 3/8 pickup line and left the 5/16 one on the sender unit. Can I just plumb into the old pickup line? Should I cut it just inside the tank? What are some of the bennies of a good return system? thanks for any help you can provide.