[ReMorton]

SwiftDB4
I think that's where i'm headed. Your comments pretty much support what the guy at the dyno shop said, not enough 'knobs' for fine tuning to turn on the Holley (model 080508-3) compared to the other options I'm looking at, and my intended use for the car. The plugs are showing rich, mpg is about 15 and I expect a power boost with higher A/F ratio.
I could only find one negative reference to Proform, that was on the Camaro Forum. Apparently they offered a carb body, only, which you could use your Holley parts to complete the carb. It was pretty much a bust, and confirmed that yesterday when I talked to the shop.
So, the plan is install the Proform 67213, then put the car back on the dyno for the final tweaks then see what happens.
I'll have the before and after results. After the work is done, I'll post it here for anyone who's interested.
Thanks
Bob