Hello,
I have a '65 Galaxie. The drive train consists of a bored and stroked 406, Holman Moody Ha-B camshaft, Hooker headers, a tri-power setup, and a C6. I launc the car around 2,500 with no problems and i am shifting at about 5500. When I shift into second the car is fine and runs strong, but when i shift the car into 3rd at 5500 it begins to lurch almost like a lean surge. When this happens it's like the car has hit a brick wall. I figured it has to be a fuel problem. Just for kicks and giggles I tried shifting it  at 4500 and it stopped lurching and I ran my best time of the night, a 14.2 @96mph, whereas before while shifting at 5500 i was running 15.5 if that shows you how bad it gets if I rev it to 5500. Something isn't right i should be able to shift the thing at 5000 or 5500. I will say that it was 90 degrees and very humid that night so that could contribute to the problem. I currently have a fuel pressure regulator running at 6.5psi. I'm pretty sure that this is enough fuel pressure, but I just wanted to get some other thoughts. Maybe it is getting starved for fuel at higher rpms?
Thank you,
Tyler  

Get a fuel pressure gauge that mounts to the outside of the car (Like an auto meter). Watch it and see if the pressure drops at upper rpms. I once had a wild 460 that would suck the fuel bowls dry on a holley 750 double pumper dry at 5200 rpms. Its not a pressure issue it was a volume issue. Can your fuel pump keep up with the demand of your motor? Are your fuel lines to small in diameter?