Did you try the 1050/4500 on an adapter, on the TF manifold?
The TF intake 1050/4150 combo was 5hp better than the unported M1/4500 combo?
I did try the Dominator on the TF intake using a Wilson adapter and it sucked. Lost 20 hp when compared to the 1050-AN QF carb.
Was that the tall adapter/spacer and was it blended into the plenum?
Easy to say the dommy sucked w/out a TALL adapter blended into the plenum..........maybe I should ship you my intake and carb for a test.............