Ahh. Now you are confusing my little mind! I have line up from the tanks to the brass tank change valve/switcher on the bulkhead, where you say, above the clutch pedal. What happens after that is a mystery. I have a NOS mechanical pump to go on the side of the engine, I just assumed the fuel line would run from the switchover to the pump to the carb. I dont seem to have anything resembling an Autovac. Although something like that would make sense else it is a lot of work for the pump to do. Suppose I'll have to suck it and see. :?