After reviewing many torsion bar eliminator K-frame kits, I liked the Gerst (manufactured by QA1 now) the most. But in the end, I decided to keep my torsion bars and purchased the QA1 K-frame, LCAs, strut rods, A-arms etc. My TTI headers are a beautiful fit with the factory t-bars and the geometry is acceptable. I did just see a new product announcement from Heidts. https://www.heidts.com/part/mo-101-1970-1974-dodge-challenger-and-cuda-ifs/ Pretty pricey but the design looks like it removed the objections that I have seem with other coilover based k-frame kits. Heidts has always manufactured top-quality suspension products so I'm sure their E Body kits are no exception