High oil pressure?

[SEVENTY1]

I had a rebuilt engine dropped in during the weekend, and my oil pressure seems really high. When it is at in park or neutral the needle almost goes all the way to the highest pressure. when in Drive or reverse it goes down to about 3/4 of the way, but when I step on the gas it seems to want to go almost all the way to the highest point. Is there any pointers or suggestions on what could be wrong. I know my father in law was having problems remembering what vacuum lines went where to the carburetor, could this be causing the problem, the maybe there are plugged in wrong?

Thanks