adjusting oil pressure

I just fired mine (440) about a month ago with a high volume pump and have 75 to 80 at idle. Same as the one right before it. I built mine tight so I expected the pressure to be that high. My sons 360 I built 3 years ago is still running 65-70 at idle with 15,000 miles. I wouldn't worry about it. JMO.
Are you using cork gaskets? Maybe over tightening them. I'm running rubber cover gaskets and no issues.