Sounds like it's beyond saving, rare as they are.
Parting it out would be a shame.
The best (and most proper, in my opinion) use would be to take a nice 'vert and use all the 4 speed parts to make a nice 4 speed 'vert. Plenty of people out there want a nice 4 speed 'vert. Trying to salvage your car will end up in disaster and serve no one, nor will parting it out so that the 4 speed parts end up in a hacked B-body do anybody any good as well.