[Keith]

I didn't think with the Holley blue I would need a return line @ 8PSI, although it was considered. The filter before the tank is an Earl's replaceable element style with -6an's on both sides. We're running the pressure gauge at one of the regulator outlets....is a return line really necessary? I've seen it on more serious applications without it but running a return would be no issue if you recommend it.
What is so strange about this issue is that the car runs perfect and the A/F is dead balls on until just about the half hour mark.....I promise to let everyone know what it turns out to be. Thanks Scott & Jody.