over heating issues

well guys i have a over heating problem i bought a new northern rad part number209691 im running a meziere electric water pump 42gpm no thermostat. have tryed restrictors, and still over heats like a mother :angry4: any ideas its a 426 smallblock . its running 220 and higher timming set 34 full in is there a way to calculate rad size to hp. and it has a 3000 cfm electrice fan. and the rad is a triple buy pass system any6 help would be great>disgust