Does it look like my 92 ? Most likely not
You need to inspect the frame of the truck and look for rotting of the c-channel. These trucks can, from first appearance, look like a great deal, and then you find out the frame is toast.
A truck that is 20 years old, regardless of who made it, is going to require some kind of repairs or maintenance Ive spent a couple hundred hours minimum working on mine, but since I was a former mechanic, it didn't cost me as much as if I had to pay someone to do it.
Dependability is based upon the person / persons who owned the truck prior to you. The engine will go all day with very little attention. It's the other parts of the truck, if not maintained that will cause you problems. Engine is not your worry, but the body, frame, suspension, and all the other mechanical parts that may or may not have been attended to over the years.
From my perspective, it's a steal, as I had a 93 before I bought my 92. I paid $4k for it because of the plow alone. It ran, pushed snow, and I drove it for almost a year. When my 92 came up for sale, I immediately snatched it up, as the 93's body needed too much rust repair, and I'm not a bodyman. My expertise is in repair / mechanicals, and not knocking tin... I sold the truck without the plow and I still got $2500 for it.
The plow alone is worth $1500. The engine is worth $1500. Dually rears are worth $800. Dump bodies are worth $400 in scrap if you couldn't sell it.
Check over the frame very closely. Behind the fuel tank is the #1 location where they rot first, as stuff gets stuck in there while driving, and can cause excessive moisture / rotting there.
Post some pix and let us know what you do. Sounds like an investment that, even if you parted the truck out, you'd still make your money back.