Who Sells Viscous Fan Hubs

You need about 3/4" between the radiator and fan. I think that the 2947 is the shorter one.

Will the fan being that close to the radiator not cool as well at highway speeds? It seems to stay at 195* in town but highway cruising the temperature has climbed to ~230*.

I installed a new replacement Spectra Premium cu5526 radiator, 6-vane water pump, MP viscous fan kit, added the Detroit Muscle Technologies hood to radiator support seal, new upper and lower hoses (with the spring in the lower), and yes I'm using the factory shroud.