"…a 90* metal elbow on the carb that is about 3" long, goes to rubber, to the vacuum advance on the distributor…"
what about that lill metal guy?
What's the OD on that?
Is that just pressure fit into the dizzy end (w/this rubber tube he seeks between)?
I'm recalling (correctly?) the carb end as cast/part of the body, air horn, what have you , but the other end is a lill tube coming out of the dizzy below the
thingamajig plate. (I've not done much adaptation to the distributor).