The picture is pretty fuzzy, but could it be an e-brake assembly? My 55 D***e has a similar looking assembly on the back of its trans that is part of the handbrake.
Yes, that is what is left of a parking brake for a big bolt, 1.5 ton or bigger. A drum was fitted over the 4 studs and a flange bolted to them that is the yoke for the u-joint.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
Moderator for Tons o' Fun , Co-Moderator Driveline Forum
JW51 - Short answer is yes, it can be changed over.
Ron - - Dusty53 "you can't dance with the Devil and then wonder why you're still in Hell" " They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel"
easy to do, and if you find someone local with a bog bolt, they may be willing to swap that rear piece for one off a trans from a smaller truck. (I would if you were local to me).