ASP Pulley
LX model (Charger and Magnum) exhaust manifolds
JBA even makes headers for the LX models.
3.89 gears from a dodge intrepid SE with 2.7L ( will give final gear ratio 3.89)
Throttle body bore job
Convert the intake system to use the older prowler intake system and get the throttle body bored from 68mm to 70mm, holley makes a plate for the 70mm setup.
If you got deep pockets there is the Prowler Pro super charger.