""I'm pulling 14" of vacuum at idle and 7 in drive."

I think that you have to address the 7"hg drop from Neutral to Drive before you choose your power valve. That is a big drop in vacuum. I would suggest that you try to tune the carb with the car warmed up with the emergency brake applied with the tranny in D. I think that you are lean in D. If this is true, then this would cause the hesitation off the line like you described.