[Unobtanium-inc]

The only thing to think about in this case is the fact that with a car that will become more collectible as time goes on, any modifications -- tasteful or otherwise -- aren't going to actually add to the value of the car. So $20k in add-ons doesn't equate to $20k in value 10 years from now. If anything they will detract. That said, if they are reversible modifications for the most part, your investment will be safe because these are going nowhere but up. -- Matt