Hi Folks,
After 6 years, my 75 is almost ready to come off it's stands. One of the last things I need to do is hook up the fuel lines and I cant remember which one is pressure and which is return coming into the engine bay. Help.
-Rob

one super crude way would be to attach soft lines to the tunnel lines, have a jar that each one goes into. turn the key on, turn it off, the jar with the gas wins

wait, you would need to cap off one line each time you tested, gravity would fill both jars...