[JLMounce]

Sometimes not re-engineering the wheel is the best route.

I looked into all of these systems recently myself. I'm not a welder and I'm not going to practice on these types of parts that hold a lot of load. All in with installation I was looking at costs around 7-8K...before exhaust modifications. My car already handles well with the hotchkis leafs in it. I don't think it's going to handle the better part of 10K better with a packaging constrained link system in it, so I went with the best leaf springs you can get.

If I was a competent welder and I was in the build process on the car, I'd probably have a TCI torque arm in the car. I think Cat 5's are the hot ticket in your situation and my situation.

I should also correct my previous post. The RideTech and QA1 4 link systems are no longer "converging 4 links." They are triangulated, yes, but the newest iteration has the upper links angled outward towards the axle housing ends, while the lower links are still using the factory leaf spring mounts. In this arrangement the roll center is dropped compared to the old arrangement where the upper links angled inward towards the differential. The Chassisworks 4 link still uses a more traditional setup with the upper links canted inward.