I like the "Super Stock " springs. Helps to keep the car flat in curves. Remember the TA and AAR's were road cars not drag cars. I agree with an upgrade in shocks, being you are deviating from a stock format. When you present the finish car, the first place a Mopar person will check out is the TA marking on the block. Sounds like you are building an awesome ride. You going to exhaust out the rear or in front of the rear tires?