While it's nice to maintain history and not chop up something that is correct and in good condition, what about the rest of the bike? If it was a totally stock, oem machine, then I'd say leave it alone. Otherwise, chop the hell out of that frame, beauty is that you will have still have your titled frame in the end. If you use an aftermarket frame, and there are plenty of choices, then you'd have to do a special construction.