Electric fuel pumps that supply between 2.5-7.0 psi are available. The mount outside the fuel tank. And, no pressure regulator would be needed. Cletis's pump is 4-5.5 psi at 32gph.
Airtex makes a 6v (+/- ground) unit that is inexpensive enough that you could keep a spare in the glove box.
I am not recommending this, just giving information.
