Only do it if you know what you're getting into.
Keep in mind that you're most likely going to have to replace ALL of the rubber lines, hoses, fittings.
It says interior needs work... Check around the net and see how much some of those pieces run. (it's ridiculous)
Look for rust man. Rust (as i'm sure you know) is bad. That car is at an age that it isn't worth replacing body panels and floorpans. Don't get me wrong, it's a beautiful car when done right... It's just not highly saught after yet... (making some parts nearly impossible to find) You can easily get a different body for around the same price.
And not to mention, the engine may have to be completely rebuilt, the transmission may be shot. Things may be seized up, parts may be hard to find.
Just a couple of things to look for.
Don't let me or anyone get you down, i just know from re-doing mine how big of a pain in the ass it was, and how much some parts (no matter how small) run. And mine is a 91, lol.
GM doesn't make the parts anymore, so either someone is making them aftermarket and thinks they can charge a boatload for them, or you have to buy NOS, which is even pricier than the aftermarkets.
Fo eights in da pickup!