IMO, it's always better to seek out a factory performance, numbers correct car, which hold their value much better than a clone car! Doesn't matter what you have into it, it is what the market will bear! I could easily spend $30k redoing my 66 Valiant convertible, doesn't mean I will receive even 1/2 of that back if I were to try to sell it! That's why it's better to build the car you want to keep forever than to build up a car that you may sell in the future, especially if it's not a factory performance model!