John,
To get rid of the torquetube I can do it a few ways, all of which would center the axle in the wheelwells . it is the 3rd option i am not sure about.
Option one: Replace the pumpkin in my 53 rear housing using the existing axles and brakes...but I would still have to weld new perches on the axle housing to both relocate it further back and to get rid of the original hinged setup used with torqutube.
Option 2: Swap the entire axle assembly form the 57 into the 53 . Again having to weld on spring perches to both switch from under axles mounting (57) to over axle mounting(53)...and at teh same time move it back in teh wheelwells.
Option 3:using the springs AND rear axle from the 57. this is the one I'm not 100% on...IF the spring bolt is centered in teh wheelwell so I dont have to run the modified perches .
I think I will opt for option 2 , using spring perches that have the locating hole forward of centerline and welding to the 57 rear axle. Brakes aren't any better on the 57 than my 53, they use the same drums and shoes, just different wheel cylinders.