I will vouch for BeCool. I installed their 1" single core radiator in my old 77 camaro many years ago and never had a cooling issue here in AZ in the dead of summer. Their 1" core claims to cool better than 3 for cores stating the middle row never cools, only the two outer rows. I've been meaning to replace my factory radiator but I will definitely be going with an all aluminum radiator, no plastic tank crap. I may or may not do an external tranny cooler depending on what radiator I end up going with. There are aluminum radiators all over Ebay but I have not pegged a specific one just yet.