Hi RC,
If your water pump is working ok (and if it has been sitting still in coolant or water for apx 3 years it might not be), then it sounds like your thermostat. If you're circulating water, have a clean radiator, a working thermostat (I prefer a 160 degree model) and if you don't have a bunch of junk back around the 5 and 6 cylinders (pretty common), your 235 should not have cooling issues. Here in DFW (the waiting room for hell) 100 degree days are common for almost 6 months out of the year. I have an aluminum radiator and an electric thermostatically controlled puller fan with a special shroud. Around here that's what you need to keep it cool in traffic especially.
