360 overheating -please help

FYI, my 360 had a new 2 row radiator and was still hitting 210+ in traffic. I took it out and had my rad guy put a 3 row, with 1/2 " tubes on 3/8" center(stock is 1/2" on center) and dimpled tubes to slow the water down to cool it more in the rad. in traffic, now it only hits 185, and maybe 190 at most.