Need advice on suspension and brake upgrades

The only advice I have is, be careful what you buy. Not everything that's shiny and new is an "upgrade". The Mopar suspension can and has handled the rigors of everything from decades of street driving, to every kind of motorsports you can think of, so a "true" upgrade is more difficult than you might think. Yes, there are some out there, but the stock suspension can be made to handle most anything, so spend your money wisely. Ask yourself if you're REALLY going to push your car to the limits of "whatever" new suspension you're looking at OR if you just want something "new and different" just because. I would research long and hard and just look at all the things a stock platform suspension can do, BEFORE you just snatch everything out from under the car. @autoxcuda is one guy on here that comes to mind. He really auto crosses his car and I believe his suspension is still torsion bar and coil spring based. Maybe he'll chime in. He'll be quick to tell you the stock suspension platform is a good one.