Well, think of it this way: you're decreasing the pool of that particular bike in original condition, so you're making it more valuable for those who keep them all original!

I'd say unless it is in pristine original condition, do what you want. Even if it is, it's your bike.

I'm the caretaker of an '85 Trek 560, received through a trade with a BF'er. It's not terribly valuable - neither the Reynolds 501 frame nor the full Suntour Cyclone group. However, I'll be damned if it'll ever be parted out. I really have no use for it, and I'm not really one to collect objects for the sake of collecting objects, but among production frames, I think the use of the full Suntour Cyclone group is fairly rare. I've been contemplating trading it, but I know there are no guarantees it will remain intact.

I know, that doesn't really help you.