Need advice on suspension and brake upgrades

You've got my car! I actually bought wrap in the color yours is, mine is a little too light for my taste. So win, lose, it IS a 7" rear, suck. However, the brakes are 10"! Do you mind if I ask what size and back spacing your wheel and tire combo is?
My suspension is custom, the front started with a Heidts universal coil spring/a-arm system with rack and pinion steering from Speedway, installed a set of 5/8" shorter control arms, fabricated a set of mounts and tossed the coil springs for QA1 adjustable coil over shocks. The rear is a narrowed Jaguar independent rear suspension. Because of all that my back spacing is custom sized for it so it probably won't work with stock. My color is 2010 Challenger Plum Purple Metallic. I have 17X8 in front and 18X9 1/2 in back.