1985 S-10 water into carb.

Part of your problem is from sitting and not runing very much. I would suspect that also its' not driven very far at all. Like undr 10 miles everytime it'sdriven or just started in place and run for a few minutes. Vehicles need to be driven at aleast 20 miles to warm up suffieciently so you don't get water in the engine. It could be a head gasket as well though. As you didn't put what engine size it is most of them weren't known for headgasket leaks or intake leaks. If it' overheats, let it get warm/hot and shut the engine off and feel the radiator. If you feel cold spots then it's bad as it shold feel the same all over. Also ifthere are any green coloredfins they are loose it's bad. The clutch fan can't be tested by "hand". It locks up due ot hot air flowing accross it. If you can get to it just after shutdown and it turns hard it's ok, if there is no shroud around it then it's useless as you need a shroud.

Are you losing antifreeze?

85 V6, sorta gives it away? Probably most likely its your intake gaskets! I just did 1 was slowly using anti freeze until it finally milked the oil on a real cold spell in winter. Look at your plugs to see if any are too clean or sludged up with heavy deposits. This could indicate head gasket trouble also. The 1 I did had normal looking plugs.