"where the front torsion attaches to the frame, that the frame ends are at least 3/8" above and below the dia of the torsion tube. That way you will get enough wrap around the TT and the fit and welding of the framerails at the taper isnt too long."
So Bruce, do you "heat-and-beat" the 3/8" overhang / underhang at the ends of the frame rails and then weld around the ends? I could see this approach substantially reducing, if not almost eliminating, the coping and weld length of the junction of the upper and lower frame rails, depending on the relative diameters of the torsion tube and the frame rails.
Any pics?