The only difference I have noticed is the clutch pedal neutral safety switch bracket mount doesn't have a nut welded on the frame from an automatic setup.
I used the k-member for the motor mounts and mounted a steering box from a Chevy van in the left front leg of the k-member.I wanted a draglink instead of the cross steer setup.
Some dodge vans and motor homes used an extension tube that used an oil cap like the 273 pvc cap, it fits into the hole in the valve cover for the oil cap
I bought a 64 valiant with the OD four speed that was setup with three levers, I drove it that way until the novelty wore off then put a regular shifter on. It was not good for quick shifting.
The spindle diameter is larger on the 73 up drum brake cars, I had the drums from a 70 e- body and they wouldnt interchange to get the large bolt pattern.
No torsion bars or control arms, the tie rod is behind the axle,the steering box is mounted in the front leg of the k-member. I used the stock motor mounts on the k-member.
It drives good, at first it had too much caster so I put 4 degree shims between the axle and springs. The axle is forged steel not cast iron. The steering box is from a chevy van and the pitman arm is a combination of mopar and chevy.