My car:
1970 Charger R/T clone
3850 lbs plus driver
Street/Show/Spirited driving
440 based 493 stroker, Edelbrock heads, MP cam, TTI headers, Demon 850 carb. HP unknown
727 with 3000 stall converter, soon to have Gear Vendors Overdrive unit
8 3/4" axle, narrowed 1 1/2" 4.10 power Lok Sure Grip
Wheels and tires: Intro wheels, 18x9 with 4 3/4 BS, Nitto 555 275-40-18 Front, 18x10 with 4 3/4" BS, 295-45-18 Rear.
Rebuilt front suspension, Poly bushings except LCA (OEM rubber replacements) Stock K member. Addco 1 1/8" front sway bar. 1" Torsion bars. KYB Gas-a-just shocks. Boxed LCAs. Fast Ratio Idler and Pitman arms. 12" Cordoba disc brakes with slider calipers. Semi Metallic pads.
Stock floorpans without frame connectors or torque boxes.
MP HD leaf springs with HD shackles, poly bushings. Addco 7/8" sway bar. KYB gas-a-just shocks. Dr Diff disc kit using 10.7" rotors and Mustang calipers. MP sealed, non adjustable axle bearings.

When I bought the car, the running gear, suspension and steering were all in totally stock condition. After I painted it, I did nearly all of the upgrades at the same time. The rear discs look great but I didn't notice much of a braking improvement over the 10" drums. Maybe I would have if I hammered the car more! The fast ratio arms were a huge difference. It went from 3 1/2 turns to just over 2 1/2 lock to lock. Effort increased. The steering simply reacted faster.