You only have one problem; Ford AOD trannies universally suck.
Time for the stick conversion...
I've seen a few Blunderbirds out there with the manual from a Mustang swapped in, and it seems that the hardest part is altering the floor console to fit the shifter boot, and installing the extra pedal under the dash.
Bill, I stand by this reasoning. That transmission is not bound to that car. It has a zipper on it. I just put the car on stands. Should have the current trans out in the next 4 hours. Putting the new one back in will be faster. Considering this is only the second time I've ever taken a trans out of this car. (first time was to install a higher stall TC)
And now it looks like I may be pulling the engine after all. I didn't want to unless i was putting in the Lightning.... which may or may not happen now. Busted a stud on the exhaust manifold taking the exhaust off! CARP!