I  just checked a FOM in the back of my garage. . The tag is PAR 7003  F2. Above this cast into the case is PAH 7006  D. To the right on the oval is stamped 56144
Measure your case DO NOT INCLUDE the 1/8 inch plate  between the case and the tailshaft housing. Post what you measure. Pete

PS I believe I bought this from a man who told me it was from a 1955 pickup. The bell housing was from a truck.

Zuburg, I sent you a pm regarding the Fordomatic I just removed from my 55 Tbird . It is the proper transmission for the car and has been replaced by a T-5 5 speed manual. I live about 45 minutes from you in Mebane so feel free to come have a look , measure or whatever you like.

Pete