STOP OVERHEATING!!!!!!

my dam mazda wont stop overheating! ive got new antifreez and thermostat. im still running the stock mazda b2200 rad with a chevy 4.3. if i have to get a new rad, what would fit in there?

I'd start with a coolant flush, possible to have some build up in the motor, or radiator. How old is your water pump? When you look in your Radiator is it all rusted?

make sure you dont have a head gasket letting go, and run a ron davis radiator, they are made to your measurements