fuel pressure

You dont need electric pumps unless running fuel injection imo. I am running a fuel cell in the trunk to a Fram canister filter mounted to rear frame then 1/2 aluminum hardline to a Robbmc 550 mechanical pump. It feeds both carbs without issues or regulators or return lines

Lots of great info here.  For what it's worth, I knew that my Javelin would be sitting for long periods of time, so I installed an electric Carter pump near the tank so I would not have to crank the engine too long.  The pump is wired to an "ignition on" source, so I simply turn the key to on for 15-20 seconds to allow fuel to fill the carb, pump the gas twice, and off we go!  I also installed a Mallory pre-luber oil pump for the same reason.  It also comes on with "key on" but has a self timer that shuts off after some number of seconds, and , yes, I can see the oil pressure come up on the gauge.  So, for cold starts, I have both the oil system and the fuel system primed and ready to go.  I don't believe Mallory makes this oil pump any longer, but there are some remote oil pumps on the market for turbo applications that might work.