IMHO,adding options won't affect the value much if at all, in some cases I believe it can increase the value. In my mind, the only exception to that would be your car is restored to a very high level (OEM specs) it's numbers matching & documented with its original fender tag & build sheet.

I know most moparts members will disagree, but look at the cars that actually sell & how much they sell for.

for example,
Put two 70 Road Runners next to each other, both came exactly the same from the factory with low options & are restored to the same overall condition. One is restored duplicating its original build per the documentation, the other car was restored as the owner would have ordered it. Your standing there with the money in your pocket......would you buy the bench seat column shift car with AM radio because "that's how it came" or would you buy the one right next to it that has buckets/console, am/fm 8 track,an air grabber hood & dust trail stripe added?