Those with Street Demon Carburetors....

got a 750street demon to replace a 670 holley that replaced my od TQ. Love the demon, responsive like the TQ. I have the same issue with the choke plate, I was going to drill/tap the tower to put in a set screw to act as a stop. The only thing i did was tune the air door.

having some issues with the choke nadjustment, idles well for a few seconds, then runs rich so i have to kick the choke off
Simple fix, place a flat washer under the lock nut for the stud. The washer hangs over enough that the choke plate hits it, choke plate not going any further yet it closes as it should when cold.:thumbsup: