Ernie,
From your photos listed it looks like you are running a 650 Vac sec Holley on an open plenum long runner manifold and I'll bet you have massaged the curve and jetting. Have you played with the runners and combustion chambers to max performance and milage as well? What mileage have you charmed out of your toy?
I have been building the full tilt boogie motors for so long I have forgotten how nice passing a fuel trailer can be. I have to trailer to any run over 40 or so miles 1 way from the shop. I need the Sunoco GT plus at 112 octane.
This insanity is by choice and would not have it any other way but I am building a stocker
for customers and wife to drive as we speak. I had grand ideas of just throttle stopping and loading a very conservative fuel map for customer rides.... What a joke, This baby will swap ends at the drop of a hat and throwing the keys to a first time driver is not an option. Isn't that the greatest problem ever to have...