Hi Guys,
I use to run a 2.5 litre(156 inline six from a english Zephyr 6).With it I ran lots of varying cams and carbs.I had a aftermarket old 60's intake with connecting sections between bases.I ran 3 factory carbs (downdraught zenith single throats).Fuel MPG went up 5mpg over a Weber two barrel, grunt out of the corners was enough to cause clutch slip on a beefed clutch, un real win-win.I had trouble with flooding but that was crap in the tank.I used the standard mech pump.The acc pumps were set standard.I ran a set of headers and 260 adv dur cam with 9.5;1 compression and it looked wayyyy cool

I used a rubber hose for balancing them, a vac guage works too or stactic setting them with a rod down each butterfly if the throat allows.Best system I ever had.
KiwiKarl