How can i improve my oil pressure in my 360 magnum

Hey all
I have a small block magnum that has had bad oil pressure for years. I put in a mellings high volume oil pump a couple of years ago but it didn't help. If I run fully synthetic engine oil I have around 10 PSI at idle. It does go up as the RPM goes up and I stripped the engine down in the past and the bearings haven't been worn badly but I'm rebuilding it soon and will be spinning it higher than normal so i thought while its out I'll try and improve the pressure.
Any mods that help?