I have a 95 s10 that is similar. Someone tried to make my truck into a ZR2 and they did a fairly good job.
Like Mul-ti-pass said, get a mechanic to check the front suspension. I had a lower ball joint go out on me while I was driving, it wasnt a pretty sight.
Im not sure if my truck is an odd ball, but i dont get 20mpg. The last time i averaged it, it was around 16mpg. Ofcourse it wouldnt be the first time I would be wrong.
IMO its a nice truck and i would buy it if i were you.