I am running the Summit carburetor on my 292 these days, and in when there is considerable heat soak and triple digit weather I get a lean condition. I bought an idle feed restriction kit from Summit and upped my sizes from .046 to .052. It is always incredible how such a small .006 increase will make.
More of that in the video here that includes a test drive.
https://youtu.be/dyMwFNYLu-w?feature=shared
Daniel JessupLancaster, California
aka "The Hot Rod Reverend" 
check out the 1955 Ford Fairlane build at www.hotrodreverend.com