65 it's more than just pressure. You can have pressure and no flow, or very low flow. You need volume at a reasonable pressure. IMO, the lower the pressure you can use and keep the bowls full and as much air out of the fuel as you can the better off you'll be.
I'm in the process of upgrading to bottom feed needle and seats to help eliminate aeration. Every little bit helps.
The tap for the pressure gauge is 4" from the fuel inlets, I put new .120 needles and seats in at the beginning of the summer.
I'll watch the float bowl levels on the dyno, good point though.
Dom also suggested knocking the pressure back to 6 lbs so that will happen as well.
