Mustang Style IFS Swap 1968 Dart

I keep trying to explain this to people.

Been rehashed here many times:
Basic suspension parameters of the Mustang II and longitudinal torsion bar suspension as used in the A body cars are very similar and benefit from similar upgrades to the bushings, spring, shock, stabilizer bar, wheels, and tires, provided the basic structure has strengthened to support any increase in suspension stiffness.
Perceived superiority of the torsion bar suspension is a result of lower unsprung corner weight because the springing medium is totally sprung weight, and because the engine box structure does not need to be as heavy and rigid when the suspension corner resistance is applied down low at the center of the chassis pan, as opposed to high into the engine box structure directly over the wheel.