For front suspension upgrades, look to the Dodge Diplomat police cars. Then find some HD shocks and the police car rear sway bar.
Are you seeking to fix worn items or otherwise?
Be advised, also, that although the exhaust system on the police V-8s had dual cat converters, the two sides of the complete system merged in front of the rear axle and the combined pipe (as in ONE larger pipe) went over the rear axle and into ONE single pipe outlet at the rear. The rear trunk pan is not configured for a pipe on the lh side of things.
Happy Holidays!
CBODY67