Albert...
PMO has a very nice fuel regulator for carbs...
works very well has the pressure gauge on it and has the return outlet which bleeds off the excess presure..
see here in a set of carbs I sold...
http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/662414-fs-pmo-40-carb-kit.html
the lines don't need to be exactly even just a good even flow of fuel via a good pump and pressure regulator....the needle valve and float do the job of filling the fuel bowl
John