1970 Dart Swinger FINALLY UNDERWAY

Well,
I agree that having all of the front suspension installed (i.e. torsion bars, controls arms, front wheels and tires) along with the rear end with wheels and tires will make a real difference, having the motor in the car will not create any type of torsional load on the subframes. I bolted and welded my frame connectors in without the motor in and I don't expect any problems. It was sitting on all four tires on a ramp-style lift.