I ran a summit brand 27.5x19 2 core aluminum radiator. Also ran a summit electric drop in water pump. I used a electric fan for a ford 3.8 tours. That set up had no problem keeping my 10.40 in the 1/4 street/strip pump gas big Block 73 dart cool. But on my next build I am going to install the rad I front of the core support like the other member on here did