Oil Pressure Issue?

Gettink back to the OP
What if you have dual oiling of the top end; that is through the regular passages to the rocker shafts, and up the pushrods. That would put "stupid oil up top".

I had the opposite problem with my LA 360 and Melling HV pump. I had stupid hi-pressure that would blow the filter pad off the block and dump oil onto the header.That's not good.So I made some mods,switched to 10W30, and Good to go.