The front yoke is gone, I'm sure it's wherever the original driveshaft is at. But from the center of the rear companion flange, to the base of the tail shaft is 57 inches.
In my study of this, I see there are something like 71 different driveshafts 🤦♂️
What I've learned is mine is a 117", AOD with a 8.8 rear end non removable carrier. I feel like this is going to be the proverbial needle in a haystack.
1984, f150 short bed straight six AOD.