Radiator choices

I am using a summit 27.5x19 aluminum rad with a 3.8 ford tours (spelling) fan in my 11.1 440 big block 73 dodge dart. i do have indy aluminum heads. also i am using the summit brand electric water pump. which is really a CVR water pump. i have yet to see my water temp get over 180 and that is after making a 1/4 mile pass in the heat.I ran this same cooling set up with my 10.5 compression 440 that had steel 906 heads and it cooled it just fine. as soon as i get some mufflers put on i will be driving my car on the street. here are a few pics of my set up. hope they help. thanks bobby