You're correct in surmising that for performance use, the Lean Burn distributor should be axed since it has no advance curve provisions, but that's not the case for the carb (more on that below).

This 1987 Dodge Diplomat is equipped with a 318 V8 and automatic transmission. It has received several recent updates, including new tires, headlights, front calipers, wiper bushings, a fuel pump, and ...