Blazers make a nice beater. They are too wide, too heavy and too made-for-the-street to keep up with the Jeeps, but are a wonderful way to get into four-wheeling. Oh, and your milage will always suck bad. On the plus side, they are built like a tank...the frame under that thing is 3x the strength of a Wagoneer. If the steering box is ever breaking away as noted above, that's a weak point but an aftermarket bracket fixes it.
The steering drag link is designed in line with the leaf spring...it takes a lot of lift before you get problems there so you're probably OK. If the steering isn't working right, it's likely something else. Blazers are nice handling trucks even with the short wheelbase, but all the front end parts incl. ball joints need to be in good condition. As for the steering box, those will normally go a long long ways and not need rebuilding so don't automatically be changing it. Be sure you know what the problem is before throwing money at it.
Umm, on second thought, that lift does look a little excessive...maybe you're on your own there...
The truck in the photo does not look like an '83...it has the old-style pre-80 front fenders. If it has a TH350, that would be the right trans for the era. Be happy, 'cause the early 700R4s are NOT reliable and you don't want one. Better to be without the overdrive, and have it work, "850hp" claims aside. Also if it's an earlier model it will have something like 3.73 gears with a Dana 44 front end...all good, never mind the mpg. '80s trucks used 10-bolt fronts with 2.73 (!) gears, way too tall for a 4x4 and didn't help the milage anyway. But...don't go jumping off of things with that Dana, it'll bend in the middle, one area it gives to the 10-bolt. You can truss it underneath with an aftermarket kit.
If the 208 transfer case has been replaced with a gear-driven one (205), that's interesting and good, but unless you're some serious stuff, the 208 is enough.
Old Blazers are their whole own thing. If you get it for a good price (don't go paying too much now) it'll be a blast.