I am still needing a 9inch tailshaft TH350 tranny. I have a 91 TH700R4 with 119,665 miles on it that works great that I am willing to trade. If you are wanting overdrive this is your chance.
Usual length is 6" I think. The 9" was used in the mid-70's Impalas & 2-wheel drive pickups (among other places I'm sure).
interested in a th400? I have a th400 out of a 71 electra 225 that I drove home and parked and pulled every ting out so i was working but would probably need new seals. if you are interested let me know. Joe
How about a 400 short-shaft? Or is that getting too short? I'm guessing you're trying to avoid having to modify your driveshaft? (I'm not sure how 700 compares to 350long).