s-10 blazer towing spec's

Does anyone know how much weight I'm allowed to tow behind my 85 blazer? Plus is my blazer's fresh 2.8L engine underpowered for towing?

I don't have the specs. And I can't say if you are underpowered or not, it depends on how much weight you are towing. If all you plan to tow is a mini trailer with a row-boat on it, you're golden.
My personal opinion would be that the 2.8 is somewhat underpowered for most items