4 the Dewitts radiator is light and easy to handle. We installed the passenger side first to allow the lower radiator outlet to pass the control arm. The radiator install was simple, but we cheated a little using the electric fans. If we had used an engine-driven fan, the hood would be off and the core support bolts loosened so the core support would move out of the way. You would then have to fight the fan shroud before the radiator finally came out.