For the last couple hours I've been piddling with the 83 and managed to get the flaring down to only like 500rpms which I can live with, for now. Before it sounded like I was going to hit redline before it'd shift. I found I have a minute vacuum leak on the line going to the modulator, it takes about thirty seconds for it to go from 14" to about 1" of vacuum. I noticed many of the rubber fittings on the end of the lines are getting all checked so I'm going to replace this anyway, but will this minute of a leak really affect my flaring problem anyway?
I also found this while looking around:
For those with modulators I would increase the pressure by a turn and go from there.
So it just has a cover which I pop off and give it a turn?