OK, with that out of the way, next question.

I'm using Dr Diff offset hangers and shackles on this Dart. The bolt head for the front spring eye is tapered and accepts an allen wrench to hold it while the nut is being tightened. The bolt head ends up right next to the frame rail so the only way to tighten up the bolt is with the springs OFF the car.(no way to get an allen wrench on it with the front hanger installed on the car) On my Challenger, I waited until the weight of the car was on the springs before tightening the front spring eye and shackles. I hope it's not that critical for the front spring eye that the car be on the suspension before tightening.