1991 Dodge Dynasty Water pump?

Engine Cooling problem
1991 Dodge Dynasty 6 cyl Automatic 60000 miles

I was driving last night on the highway and my check engine light came on. I immediately pulled off at the exit. Within a few minutes, my car had overheated and was pouring steam. I let it set for almost an hour and added water. I cranked it up and it sounds like my car is angry at me. One woman described it as a tin can with marbles being violently shaken. Someone suggested it may be the water pumps hose. I would think if it was the hose, that sound wouldn't present. Thinking it's the pump itself.
How long does it take to replace the pump DIY? I can read a Chilton's and have done the pump before on another car. What am I in for with this one?