[Smokin427]

Thanks for all your comments and help. I first tried disconnecting the secondaries on each carb but that had the same lack of power, only worse. I then reconnected the secondaries and put a wood filler down the middle inside the intake. it is a wedge shape 3-1/2" wide by 2-1/2" high by 13-1/2" long. It definitely amde an improvement but not to where it should be. It did show me the problems are with the intake manifold. I will now go back to my stock Ford HR dual quad intake which now has raised ports to match the raised floor ports in my heads. I still want a single plane eventually and may have a Thunderbolt friend modify a stock dual plane (if I can find one) to make it a single plane like he runs on his real Thunderbolt or wait until Jay Brown makes his PSE type FE intake adapters and find or make a single plane intake to fit up to it.
Thanks again for the helpful advice.