Intake Manifold To Throttle Body Size

[Dennis Detweiler]

I have a 39 with 201. The carb that is on it (Ball & Ball) that I rebuilt is from an early 50's Dodge truck. The intake manifold has a steel sleeve in it with an opening measuring 2 1/2 dia. The carb throttle body opening measures 2 9/16. I also rebuilt a BBR-1 economy carb, but it has a smaller mounting bolt pattern and smaller throttle body bore, so it's not a fit. Is there supposed to be a steel sleeve in the manifold carb bore opening? It's also a split manifold. The carb kit came with two carb to manifold gaskets. One is  2 3/4 diameter opening and the other is 2 5/8 diameter opening. I'm assuming this BBR-1 will work properly with the engine and the steel sleeve is factory? Thanks for the input on my posted questions.

Edited November 14, 2017 by Dennis Detweiler
misprint

[Bryan]

Restrictions usually increase air speed and vacuum at that point.  Unless there is some kind of vacuum port coming into the manifold there, you wouldn't think it would cause a problem taking it out. Not really sure.