This is, IMO, totally your decision. I have a bone stock Glastron, that I will keep as close to factory as I can. It draws attention at our THB events and I'm very proud of it. I also have a Hot Rod Liberator, that I have re-motored, re-glassed, and re-rigged to my personal taste. I think it will draw some attention when I'm through with it, and that's what I'm getting out of this sickness we call Texas Hot Boats.
If you keep it stock, it will certainly be worth more as time passes, and you will have a much larger crowd to sell to. Building a Hot Rod boat, is in most cases financially loosing proposition. The chance that a potential buyer will have the same taste in paint, interior, etc. is much smaller that the true classic.
There are hundreds of "project" boats out there. A lot of them are at bargin prices, especially if you do some of the work yourself, but a bone stock vintage boat is becoming a rare treasure.