Air Gap + TQ + Spacer = ?

I have an airgap on a mild 360, currently have a Eddie 750 on it. I also have a TQ and am thinking I may want to try it if I have the hood clearance. So, what do you guys think about it? I would like to try the TQ due to fuel mileage(I know, I know-if you want mileage buy a.....). Worth throwing the money on a spacer or just try to find a 650 Thunder or something similar to that?

Thanks in advance

Jason