The SRS recurved distrib was vac and mech adv, but had the vac removed entirely (I can't remember whether we did that or SRS). The lack of vac can keeps me from mixing it up with others, but otherwise probably doesn't matter

We run anywhere from 34 to 40 degrees of total advance (i.e., set at 4000 rpm), depending on several factors (weather, fuel quality, engine condition, etc).