I am not sure if mine will respond to MVA because of using a Lean Burn locked distributor.
I had it set at 34 degrees, and really the idle was pretty good, but I did not test if it wanted more. I really need to get a distributor that I can set up a curve in. I actually took 2 other distributors apart yesterday, but both have bent shafts. I was wanting to put a shaft with weights in the lean burn dist. housing that has the good bushings.