All mentioned above is right on, one other question. What are your plans for this car? If drag racing you are going the wrong way in Torsion bars. 1.03 will not transfer the weight well. Most use /6 bars or lighter.
I'm assuming with a 505 BB, beefed chassis and fatty tires that car is running at least in the 10-second range (??) in the 1/4. I forget which ET range it is exactly but definitely by the 10s you actually want the torsion bars stiffer as trying to maximize weight transfer isn't as important and making the front end easier to lift at launch can cause other problems. I remember reading that in the MP chassis manual.