Does the haynes manual provide a specific angle for the choke plate and settings for the choke pulloff? If so, you can purchase a choke angle gauge from a NAPA auto parts or a thexton distributor. Once you set the correct angles for the choke, it should run fine.

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87 GN, and new toy: 1955 Chevy 3200 pickup, soon to have: 383, Cola crank, Childs/Albert 6 inch rods, Brownfield heads, 10:1 KB hypers, CompCam 284 Extreme Energy, Tilton Plate transmission realignment and built Turbo400.