I have a 67 fastback I'm in the planning stages for restomodding it. I'm going to put a TCP power rack & pinion and their front suspension on it. Now the rear, does anybody know of, done, etc any of the following and what they're like, or others: Total Cost Involved rear torque arm suspension package, Heidt's bolt-in rear 4-link kit, TCP g-Bar, or any others? Thanks!!