RRR has a good handle on things, but I would add this.
If it were me driving an older V8 with big clearances (which this motor obviously has) and was in the situation the OP is in with his oil pressure, I would fill it with straight 50 Valvoline and drive it home.
From San Fran to where he lives he's not going to run into any overly cold weather, but is going to be doing some slower pulls in higher temps as he get into the LA area and on home.
Anyone can disagree all they want :D but this is what I would do if I were in the OP's situation.
