I agree with FCGuy that you do mods because you like it!
Personally, I purchased my S for what it had from the start.
Not to put on kinds of aftermarket stuff on/in it.
However, to each his own. ralper, to your original inquiry-
I believe mods would do less for a vehicle as a classic.

 

i agree, that is why all the "mods" i have done are "bolt-ons". i still have all the oem parts - intake, exhaust, sidemarkers, hell even the p.o.s. radio. with a torque wrench and a few basic tools, my car can be made "stock" in a few hours.

 

I think there will be some collective value to many sports cars in the future. When all the cars are running on hydrogen or whatever, the liquid dinosaur fueled auto will seem like a novelty worth having.
As far as modifications go they usually diminish value in the long run. My dad is a Corvette collector. In every car he purchases he looks for it to be as original as possible at the start. From there he "fixes" all the items that are not O.E. Its a lot of fun, but there is something to be said for the modified classic.

 

[QUOTE]Originally posted by ralper
[B]I think that the least modified cars will be worth the most.