SBP American Racing with adapter suggestions

I'm considering trading the SBP ralley wheels currently on my 66 cuda to the 64 valiant. I really like the look of the American Racing Torque Thrust II on the 66 cuda. I'm considering getting the 4.5" adapter plates to run the 4.5" american racing wheels. Has anyone done this and can give me some recommendation/suggestion on wheel backspacing and tire size with the adapters (1" thick adapters)? Thanks guys!