I've had a set for about 15 years.........I thought fitment was ok, though the coupler joint rubbed on a tube, dimpled it and was fine......my instructions did not ask you to remove a torsion bar, just (very carefully) slipped the collector up over the T-bar, used a mini starter..........if you are putting in headers, might as well clearance the passenger side structural at the tranny mount for pipe clearance.......another thing, periodically pull the tubes that are slip fit, they will, over time, oxidize and stick to gether
And yes they are a copy of the old D-Dart headers