[Gaz64]

Paul,

I run a Mallory 3 port bypass regulator.

My system is plumbed splitting the main supply line to the rear carbs, then to the front carbs, then off the front carbs to either side of the reg, then out the bypass and back to the tank on the return line.
My pressure gauge is mounted on the side of the regulator.

My reg is mounted after the carbs as above, with a bypass reg this is the best way, that way the carbs are getting fresh unheated fuel.