Besides 2 different stock radiators, I've had two different aluminum radiators in my car.
The current set up is using a 22x19" GM style universal with a single 1560 cfm S blade fan pushing and Mezeire water pump. I haven't noticed temps any higher then 170 after back to back passes and a little street driving, I have the grill plugged as well.
I did have to make my own mounting brackets for this radiator.
Before I had a 31"x19 universal with the same fan pulling but had a stock replacement water pump and the grills open. Temps stay around 160 constantly after I figured out the thermostat opening size. I had 3 thermostats stick so now I just run a restricter. Mounting was easier as I could use the stock mounting configuration.
I believe the stock radiator dimension is 26x19.
HTH