273 Overheating problem

what kind of temp. on the thermostat are you running? drop it to a 180. does your current radiator have a shroud? can it be fitted with one? if so get one it will help. what type of fan are you useing? 4 blade? 5 blade? change it out to a 6 or 7 with a thermostaic clutch. this will also help. recored radiator you say? did you go with larger core tubes and tighter rows or just add another core? how is the waterpump? try to start it cold with the cap off. stick your finger down in the radiator and wait for the thermostat to open. if the flow from the water pump in non existant then water pump should be checked for an upgrade or replacement. you should feel and see the antifreeze moving around when the thermostat opens up and starts to circulate.......