Definately keep it white so you can roll in your 5.0 with the ragtop down Vanilla Ice style.

Unless the car is low mileage in immaculate shape w/excellent paint and interior, I'd say don't bother worrying about a color change ruining the value of the car. Foxbodies aren't exactly collectors cars. The only instance where I could see repainting the car lowering the value is in rare circumstances where the car has very low mileage and looks/smells/feels like the day it rolled off the showroom floor.

BTW...welcome back.