After levelling the car on jackstands and welding in subframe connectors my Dart does not sit level on the ground anymore. After the initial panic set in I left the car for a few days to clear my head. Carrying its own weight on the suspension the car is low by 3/4 an inch on the passenger side rear and about 3/4 of an inch in the front right. I then placed the car back on the jackstands and measured the car in various locations from the frame to the floor and found the car to be square again. My car always had a sticky passenger door which is now free and smooth.
My question is this. Is it possible that over 40 years the torsion bars weakened at uneven rates, but rather than cause the car to sit cockeyed the unibody absorbed the difference over the years, and now that the car has been staightened this problem is showing itself? I realise one mistake I made was having the rear jackstands under the axle when it was welded, however the fronts were under the frame. Shims were used and measurement and levels were checked and rechecked before any welding took place, it was level. Like I stated earlier the car does sit squarely on jackstands when placed under the frame on 4 corners now, just not on its wheels. I should mention the rear springs are brand new while the torsion bars are original. Some friends of mine suggest the problem lies in the torsion bars and I should adjust them accordingly or get new ones. Has anybody had this situation occur before? This is very stressfull as I worry I have damaged a perfectly good original car. I should also mention it is a solid southern US car with no structural rust or problems.