problem installing ac on a 350 sbc

[Sweet Willy]

The problem is I have an electric water pump. Has anyone overcome the problem of pulleys etc. Would a serpentine system work? I like to use my truck as a daily driver, but at 71 yrs. old I just can't handle the heat in the summer anymore.
What seems to be the obvious answer which is to go back to a standard water pump configuration is not an option because I have an original radiator. Ordinarily this radiator would be too small. But, with an electrical water pump the water flows at the same speed if it's at an idle or 70 mph. I've done parades, etc. and the water temp never changes. To change over to original pump is too expensive as I'd have to buy the pump and all that goes with it plus an aluminum radiator.
Hope someone has a doable solution.
Thanks to all.