prorange as i said i worked on my problem today im running a 502 bbc with a tunnel ram and after about 10-15 min i noticed the fuel in my clear filters start to bubble and fuel level go down . upon checking i found that the fuel lines to the mech pump were cool but the pump and the lines to the carbs were very hot. so i went and bought a pump that has a returnline on it. ran the engine 20 min and filters stayed full and the pump was warm but not hot like before. didnt have time to run longer.
my thinking is with the return fuel flowing and constantly moving it is keeping the pump/fuel cooler and maybe the pump isnt working as hard and heating up. but thats what ive found so far in my search. ill keep you posted as i run it more