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[OldSkool]

I'm trying to get Old Skool back in the water after a brief hiatus. Ordered up a new 2 bl carb and installed however I can't get it to idle down past 900rpm. Idle adjust screw is backed all the way off the linkage. Any ideas? Linkage may be incorrect? The part number was a direct cross from the original. Also trying to install an HEI distributor however there is no vacuum on the old one. Where should I pick up the vacuum? Carb or intake manifold?

 

[Espos4]

Disconnect your linkage and see if the idle comes down. It may be binding and not allowing the throttle to close completely.

Also look for open vacuum ports on the carb and intake manifold. Any vacuum leak will increase idle speed. The carb to manifold gasket could a source of a leak too.

Distributors typically like ported vacuum, not manifold vacuum.
Look for a vacuum port that is above the throttle plates, not below.

 

[Thornton69]

Confirm the throttle plates are seating together with the idle screw backed out. A faulty seal at the base gasket could also cause an issue.