Actually if the long tail shaft has two shifter mounts you can use it in an A-body if you don't mind a little fabrication. You will need to fabricate a adapter that bolts to the rear position on the tailshaft and positions the shifter forward to the normal a-body position (the front mount is partially under the torsion bar cross member). The second thing is the drive shaft will need to be shortened. Bigblockdart.com has a drawing for the adapter.
I put a long tail shaft A833OD tranny in my 68 Barracuda back in 2000 and now 70k miles latter I am still rowing the gears.