Mopar Circle Track Help?

Those cars have transverse torsion bars, and are all the same size from the factory. Firm Feel makes bigger bars for these cars, but they are major dollars.... You should be able to hide a small coilover spring around the shock, to get the wheel rate you need. And you need good shocks, these cars are hard on shocks, they are mounted to almost in the middle of the arm, not as far out as on A or B body cars. The leaf spring rear, is really good though, you can get really good foward bite from a leaf rear, but it needs to stay soft, compared to what your used too....