if you are on ported (my choice) I would hookup the hose/adj its tip in point after the initial/total/springs have been finalized. If on manifold I would want it to come in sooner (CW with a 3/32 allen wrench, start with 2 turns), so the timing is stabilized at your hot in gear idle speed as opposed to it coming in right where your idle vac is as you posted but I ain't up on manifold so I would Google it as there are some really in depth/comprehensive threads on it. I'm gonna try it one of these days as it might be the way to go. Ported was one of Ma's partial solutions to emission regs on for the most part DD engines & your number sounds hotter than stock.