Does anyone have a manifold like this? It has a boss with a hole coming out of the bottom of it between 2 and 3. Lousy picture I know, but that is all I have.
I have one in my manifold collection.
Looks like the exhaust part to a "Controllable Holley Manifold", see page 306 of Murray Fahnestock's book, "The Model T Ford Owner".
Looks like it would make a cool setup for a dual exhaust... you'd need almost a custom-bent 90 degree L attached to it to miss the intake, but that would be pretty nifty. Or at least pretty different!
Tom, I sent you a PM, there is one on Ebay right now, the listing ends in 15 hours. I have no connection to the seller or the listing.
Hopefully, you're one of the folks watching the listing.