390 w/open chamber heads

I'm pretty sure the original AVS and AFB rods are not interchangable. I am not sure if Edelbrocks are the same deal. I think they are - meaning seperate strip kits for each. It's the steps in the rods and how each design's rod hangers operate. AFBs had less movement and one step plus the power step. IIRC AVS had two steps and power, just lik the Thermoquad successor.