adjusting oil pressure

I think my oil pressure is a little on the high side. My gauge is pegged. The gauge doesn't have #'s so I hooked a mechanical gauge to it. If I remember correctly (been several months), it was 70-75 at idle. The car smokes a little from time to time. I think I traced it down to oil entering the carb at the PCV hose. The hose is 30" long and te valve cover has a baffle. I also have a lot of trouble getting the valve covers to seal. Does it sound like the pressure is too high? What should it be and how can I lower it (spring in the pump)?