Ryan,
I've resurrected quite a few of them in the past. The main problem I've run into is lack of brazing, blades not fully attached at the rear, and blade alignment problems.
You'll probably need to make a "usability" accessment yourself. I grind them, shoot them and go from there... mostly they are reserved for chucks, racoons and coyotes anyway.
The back is still giving me fits and limiting my shooting and mobility. I have an appointment on the 17th that I hope will fix the problem.