I used a motorsport heavy duty 3 row(brass).Its cheaper than aftermarket aluminum and better than the stock 5.0 radiator.. you can also pick up a summit direct fit aluminum radiator for a few bucks more. I think the motor sport one is around $200 and the summit aluminum one is $275. Also if you want to save some more money just go to the junkyard and pick some electric fan off a wrecked a car and modify it to fit the radiator. Brand new electic ones cost alot!!! Trust me I know all about building cars on tight budgets.