Was looking at doing a 4 link but now that the torque arm is available for the 12 bolt may go that route. What would be the best fit for a 66 hardtop that sees a lot of track time and a lot of street time. Maybe 550 hp now and looking to add more. Would like to eventually run 6.50 1/8 mile and bottom 10's 1/4 mile. Running a TKO600 now and plan on staying with the stick. Biggest problem I see with the torque arm is it looks like it weighs a ton !!! As far as ground clearance I always thought the shock mounts even looked too low even on the 4 link. Is there a way they can be raised some ?