I am running an air/water intercooler. I considered using an AC condenser but when i tried to flow water through it it was very resrictive. It is meant to flow gases not flow water. I passed on the standard "oil" coolers becuse the BTU ratings sucked. I went with a Saab heater core. Its a 12 pass cooler and is very compact yet it flows very well. As for a pump i have a Holley "Blue" fuel pump. It flows 110 gallons at 14psi. The cooling system doesnt have any back pressure so the flow is ever more. Just make sure you use a 50/50 mix of water/antifreeze to keep the pump from rusting solid.