diesel rad $440cdn heavy 350 rad $250cdn bigblock rad $250cdn which one to use? Propane small block with a turbo planned once the supporting pieces are in place. I am thinking about the Windstar fans as well. I have never had an overheating problem with the 4 core small block rad that couldn't be blamed on a bodylift and hacked shroud. I am leaning towards the diesel rad with built in engine oil cooler because it is the biggest and the engine oil cooling seems like a very good thing to me. if that was offered in a standard width I would take it. I might have to play with rad hoses a bit to fit the big one to clear my van compressor. did vans get a big rad and a 6.2? so which is the best choice?