I recently did an engine swap in my truck and installed a super duty fan clutch. It made my fan roar at normal RPMs. After some investigation I determined I needed a regular duty fan clutch. It works fine and no more fan roar noise. Price was good and it arrieved right on time for our first camping trip.
First observation is that it’s not built as well as the stock Ford unit. I installed this fan clutch on my wife’s truck with a totally stock 302 and in less than a week, it is locked up solid!