really high oil pressure

i was out adjusting my carb and i reved up the motor a few times to clear out the carb for float adjustment and then the oil pan gasket started to leak and smoke oil off the headers. so i quickly shut it down thinking i blew a gasket. i started it back up and at idle no leak. i reved it a little more and the oil pressure quickly climbed to 80psi and looked like it was going to keep on going. i have a pvc valve and a valve cover filter vent. is this normal. i dont want to blow gaskets. :sign3: