Nick,
Your curve looks a lot like mine. Not surprising since they have the same crank. My plan is get it out, get it apart, measure everything, and come back here with the data for a consult. Then I'll order some parts. I'm keeping an eye on the classifieds - there are some intakes for sale but I'm not interested in them (Edelbrock Streetmaster, a Weiland, and an Offy 2X4). Then I'll order some parts - I am going with a hydraulic roller - get them installed, measure the pushrod spacing (my buddy has a tool for this), get them ordered, fix some oil leaks, and then get it installed. I will then set it up on a dyno and I'll post the new results. 
Marc, Novak out of Utah quoted me $3,200 for a T19 to Dana 20 combo using an adapter. I decided to go with engine upgrades first, thinking A) I'd like more power, and B) it wouldn't cost as much this year. A) is till true, beginning to think B) may be a misunderstanding! Once the engine is out who knows where I'll stop.
The Dana 20 is cool because it comes with separate front and rear L-N-H shifters. I always wanted a front wheel drive F100. The T19 is attractive because it is a true 4 speed.