Steering noise

[SkinsandJrfan]

Guys, I have a 68 Camaro. Running a March Performance serpentine system with remote res for power steering. The res is mounted to the inner fender not too far from the pump. I have seen some things about steering making noises when the fluid heats up. I am running Royal Purple fluid. It does not make noise when I start it up but after driving it a while, the res gets very hot to touch and the steering is making noise. I have noticed threads talking about coolers for the PS fluid. Im looking for help with suggestions or part numbers for a fluid cooler that will prevent the hot fluid, hot res and noises.

Thanks