On thing to consider is it may be worth while to straighten the tub depending on the issues. Swapping parts over takes lots of time. i think you have a bolt in cage, but for guys with a weld in $1000-1500 at a frame shop is cheaper than a new tub since you don't need to 1) buy the tub and 2) put in a new cage.
For a bolt in it comes down to the labor to swap parts and aquire what you need.
What happened? Are you ok? I assume there was contact someplace. What part of the car?
I have an 83 tub, but it would need some time on a frame machine. Kent buckly may have a spare tub. BTW... any year tub will work if you are doing a tub swap. 83-85 all have the same parts. 85.5-88 have some different parts, but depending on what you can salvage it may be ok and work out.