If you like it and if you feel that it's your car, then buy it. I don't know why you're asking. I agree that it has to stay stock...
If you have the money to make a COMPLETE resto (not low budget "resto" with putting most of the old parts, just repaint it), then do it. Yes, it's hard, it takes time and money, we all know that, but there's always something cool when you know that you made this car alive from nothing.
At least i did like that with my tii. I just saw it and i told to myself "this is my car" and that's it.