I've been down this road with my 427 center oiler. It's always had high
oil pressure at start up and maintains high pressure (60+) at cruising RPMs even when it's warmed up. I've had 2 Melling HV pumps in it. One when I got the engine and a new one when Keith Craft stroked it for me. It has a Canton road racing pan with a windage tray as well. I also have dual remote
oil filters and the block was
boiled, tumbled and magnifluxed by Keith before the rebuild. It still starts up around 90 or so after 8,000 miles. Don't worry about it. It's OK. I've used both 20w-50 and 10w-40 Brad Penn in it and saw little difference in
oil pressure. These are tough motors so go out and enjoy it.
Tim