The DB30517 is the one I got, the other is a thinner alternative although they have a lot to choose from. I've been using Fluidyne for quite a while and they are very good. A C&S custom rad would be best but quite expensive. Haven't got the rad yet, still waiting on special order. It was quite salty too at $350, came out of the Ol' racing budget
DB30517 Late Model Oil Cooler
Fluidyne Legends cooler