Can't say I knew how rare it is, just always liked them. Only got one picture so far from when we dragged it out from its resting place for the last 30 plus years.
This is the only pic I have of it at the moment. Dragged it out of a yard where it had been sitting for about 30 years. Apart from the dent and the window it's straight and complete.
Looks like there are shorty, 8”, 15” and 18” adaptors for the torqueflite. Mine came with one that is 13.5” so I guess that is considered the 15”. I think the 18” would be the best fit as it would hang the overdrive behind the crossmember, up under the seat where there's more room in the tunnel...