I've been running temps above 80 degrees C in town when running hard. I believe the radiator is original (159k miles) and am considering overhauling the cooling system (flushing system, replace water pump, replace thermostat, replace all hoses, and replacing the radiator). I've read somewhere that a higher capacity replacement is available with a reinforced upper neck. If I''m going to go ahead with the overhaul, I'd like to go with the best parts available.
Thanks for any light you can shed on this issue.