Guys, As a temp fix, I have the Mr. Gasket 1560 part number installed and its a big POS

The needle vibrates between 4-8 psi all the time, I confirmed I have a steady 6psi with shop test gauges.
Aeromotive seems to make quality fuel system parts but I wonder whose gauge they sell.
Thanks for the Kirkham product ref, I will look into that one.