Kwkenf. (Old School here from the GTA Board)
I went with a Brand New T5Z from ford Racing in my 66, has the 2.95 first gear. It's great (cost 1800 CDN). My buddy went with the rebuilt T5 out of a 91 V8 stang. Cost him 850. It has the 3.31 gear in it, better for a slow speed traffic, but he's gotta shift sooner then I (3.73 rear gears)
Either one seem to work well, the NEW tranny only has about 1500 miles on it, and is a little notchie. We found when we did the installs that they fit WELL any larger tranny like TKO series would require some serious floor massaging or inventive ways on getting the pinion angles set correctly.
We are still having Pinion angle issues with our current cars. He is using the tubular cross member and I'm using the Driveline one. They both seem to fit/have same issues. The holes, in the floor, where the shifter comes up need to be ground out about 1/8 th of an inch on his 1/4 in on mine (front and right side)
good luck either way, it is a FANTASIC upgrade!
EDIT: You better bring 200shot next season.... your toast LOL j/k