I don't know how much your system will hold because of the after market radiator but If this is the first time putting antifreeze in your engine I'm sure there's a special procedure to insure a complete solution fill .(I believe it has to do with elevating the front of the car to make sure there are no air pockets in the system while filling.) Here's a link that may help some .
http://www.thirdgen.org/techboard/te...-capacity.html (Cooling system capacity) Also allot of the guys here including myself are running a 180 degree thermostat. Just something to consider.