As you'll see there the brackets should've been welded to the axle at 36" apart and the frame bracket provided shouldve sat outside the frame rail. Given the axle is done, my only choice now after calling TCI is to move these brackets inside (despite being designed for outside) and they recommended boxing that part of the frame so i had something to mount it to.
It looks like TCI does not know the frame for your 3/4 ton is not the same width as the 55-9 frame. If you weld the axle brackets at 36" apart, they will still be wrong. Their generic instructions for 47-54 should have specified for short bed only. You are in good position to provide TCI valuable R&D information, possibly including photos, and they should be able to provide the kit correctly at reduced or zero price.
Those of us in the repro parts business often rely on information from customers to get the parts right. Unfortunately we don't have access to drawings and specifications for every truck. They should treat you right.
Mark
