Survivor...?

If that beautiful '66 Dart were mine, I'd keep it original. There are plenty of modified Darts but the really nice original cars are rare. The modifications you do might subtract value to a collector. It's true the early a-bodies are not as valuable as some of the other Mopars, but as those cars reach stratospheric levels, the less desirable models wil increase in value as well. But in the end, it's your car and you should do what makes you happy.

Take care,
DonC