Quote Originally Posted by julerb View Post
As i recall the lower line with all the clamps is the return. I also remember a clamp on that line to adjust the pressure
Thank you. I believe that is the current (inherited) setup on my car. Fuel filter just before PMO block inlet left side. Return to tank on the 90 degree fitting. I suspect the bit with the three hose clamps is a barb to barb, acting as restrictor on line back to tank. (Probably had an external clamp at one point).

So the old PMO block has no restricting / regulating function, correct? Just a splitter for the carb lines?