Tea pot carb help

[scooder]

Also you have to understand that the loadamatic does not use a combination of manifold vacuum and ported vacuum.
It uses ported vacuum (slightly above the throttle plates) and venturi vacuum (at the venturi of the carb (the narrowest point) only loadamatic carbs have the venturi junction for vacuum. The vacuum ports are connected inside the carb. Manifold vacuum would peg the timing at full advance at idle, not good.
When all working and correct, it's a good system, that works fairly well. Problem is most are a bit stiff on the advance plate, been fiddled with on the spring tension and plain wore out. Because of this they ain't given a fair chance. Folk are to quick to heave them out and plop something else in there, oftentimes an aftermarket ignition (Mallory) that has a sbc ignition curve in it !! In this case, with a stock engine, a loadamatic in good condition would be a whole lot better than that bloody red cap of disappointment.
Martin.