[scicala]

"The air intake on the choke housing should be blocked off as to not permit a vacuum leak or ingesting unfiltered air. Depending on electric choke design, they may recommend a brass fitting containing a mesh filter to somewhat filter incoming air and to prevent the choke thermostat from over heating."

Do not block off the threaded nipple on the choke housing where the original hot air tube from the manifold connected. You need the air flow thru the housing and bimetal spring to keep it from over heating. It isn't anymore of a vacuum leak than with the tube connected s original. It's a very slight vacuum leak that doesn't effect the carburetor function. If concerned about dirt being drawn in, you can put a cap on it with a fine brass screen.

Sal