Fuel Regulator

[Joe Curry <spitlist@gte.net>]

I am in the process of ordering all the components of my fuel delivery system 
and to be sure of what to order, I need to ask what the
consensus is of the fuel pressure requirements of twin 40 DCOE Webers.

It seems that I have basically two choices which appear to be 1-4 psi  and 4-9 
psi regulators.  Which of these two adequately cover the
required range for this setup?

If the answer is neither, please recommend something that does work.

Regards,
Joe Curry