Oil pressure-How much is too much?

I just ordered a Sealed Power regular volume/regular pressure pump. I'm getting the trans back next week and have to get it in and test drive it to verify the trans problem is solved. It a cold winter here in New England and I'm not comfortable at all running it with the high pressure in these conditions. I'm going to simply swap in the new pump as is and if the road is clear of ice and snow just get the testing of the trans done and if the trans is OK, go on to dealing with getting the cooling system up to speed by upgrading to much higher CFM fans. After that I'm waiting till springtime to do any additional sorting of the oiling system.