My main concern with it is that if you just now spent all this money, why are you selling it? In most cases that I have seen the amount spent will be more than what the vehicle is worth if done professionally. So now I either worry about how it was done - home mechanic, etc or if something is...
I think with any vehicle, it depends on what you do and how it limits the market of buyers. Ex: Engine swap. Even Diesel. Some people will be very interested - but not nearly as many as a nearly unmolested OE truck. Personally, I think this comes into the fears of not knowing if everything was...