Ride quality even worse than expected. Advice welcome.

I hear what you're saying (even if nobody asked :D ) but you have to hear something: Not everyone just wants to go to car shows and the drag strip.

We each have a vision for our cars and for most of us, we do the best we can and get there step by step. I have wanted to make my Dart into a competent handling car since I got it when I was 17 (23 damn years ago).

An A-body isn't a terrible place to start for a handling build. They have some limitations but their simplicity, well engineered suspension design, relatively light weight offer some respectable potential and it can be done without drastically altering them away from being the lovable, honest, practical 60s/70s cars that they always have been.

You say "lumber wagon" in a derogatory way but maybe you don't appreciate that there is a reward for giving up plush driving comfort. Stiff/rough ride is fine so long as the car turns-in and behaves in a way that justifies it. I know the second part is achievable. I'm just not there yet.

Well I gotta say, I'm the first one to jump on "big wheels suck and low cars suck" bandwagon, but I have to admit here, your car LOOKS great. To ME. Wheels, tires, stance and all. So consider yourself privileged. LOL I don't think your problem is going to be torsion bars too big, or something that you're going to have to unlock the space time continuum or the secrets of the universe to find out. It's something stupid simple. You've got a LOT of high quality parts on your car.

Therein lies some of the problem. WHen you change a LOT of stuff, sometimes you run into things like this. It's sorta like a race car. All my life I've heard the old guys say "change one thing at a time" and it's true. If you shot gun it and the car slows down, what caused it? You won't know.

But sometimes with some of these kits, you don't have a choice. You have to change a lot of things at once and sometimes you're left with having to diagnose a new problem. I wish you were local, I'd come over and help you out. This is right up my alley. I did alignment and suspension work for years. I'm good at findin stuff. I know that's no help, but the sentiment is there. LOL I bet when you find it, you're gonna kick yourself.