SBC with a refurbished Rochester 750, the engine has been running great but it boggs/cuts out sometimes when I get on it, not everytime just sometimes. I've had a few people tell me my air valve tension was too light and how to adjust it and I did. It did seem to make it a little better but now the idle is screwed, instead of a nice lo steady lump (big cam) it seems to run and sputter. Any help would be appreciated. I'm using a Victor Jr Intake by the way.

This may not be the case with your set up but you might investigate the logic in this.
Q-jets were (are) calibrated for dual-plane manifolds. With a dual-plane manifold, each cylinder accesses only one or the other of the two primary throttle systems. With that being the case, a single plane manifold would allow any one cylinder to access both primary throttle systems at once and as such divides the pressure differential in two. This means that the 'signal' available for idle fuel to flow is cut in half and may cause a lean condition. Some provision for richening the idle circuits may be necessary to achieve good idle quality.
Check with Sean Murphy at SMI (Sean Murphy Induction). He has a lot of experience with the Q-jets.