Too far gone?

Hey guys, Im just looking for second opinions on my car. I recently took it off the road to try and sell it because im frustrated with it. I blew the axle tube out of the center section and second gear in the tranny is shot I think. I've had to re-fabricate the drivers side strut tower and subframe in the wheel well because it was so badly rotted. But im at a point where I dont know if the car is worth fixing. The previous owners whipped the **** out of the car and fed it tons of nitrous and the motor stumbles off of idle and the MIL is on. Im just really saddened about the whole car seeing as I wanted one for years and I got shafted on this deal. I also just spent 2 grand on the car rebuilding the front end consisting of coil springs, struts, wheel berings, brakes, brake lines, and new power booster and master cyl. I mean the car has alot of good points but theres alot of bad points too. Overall the car is solid but I just dont know.

thanks guys for the replys i havent been on here in a few days. I recently found a t-5 for $100 and a posi 8.8 out of a 5.0 for $150 even if the t-5 is shot ill use that one as a core on a brand new one that i can pick up for $700 and then rebuild my other t-5 as a spare or what not. also as far as torque boxes go how do i tell if theyre "torn up" and im deffinatly interested in buying the torque box braces

And as of now with what ive done to the car and what i traded for it, im probably into the car for about 5k