Pulley Diameters

Thanks C. Im using the stock factory ac rad(67 273) Although none of ac underhood components are being used. Always running around 210* for the past couple years. Don't like it.
I'm going to see a rad guy this afternoon and take my 69 340 rad to get it priced for recore. He comes fabo recommended, so I will take the cuda for a rip so he can see what I have for a current setup in it as well.
Maybe I'm too paranoid running at 210*??
I will pick his brain to see what he says.
Not a hijack. Please continue as I think this may help more members than just us. I've read a ton of threads on heating/cooling & I don't recall seeing much info on pulley diameters, etc.