It appears that you have headers----------that one line off the top part of the carb just supplies filtered air down to the area of the exhaust manifold where it was heated and then back uo to heat the choke so it would open

couple of choices---convert to hand/manual choke
get a piece of 3 or 4 ft look steel line from auto parts store, work it around a header tube(one thats easy to get to) by hand 2 or 3 laps, then up to choke housing---put a hose clamp around the tube on the header to secure and hold tube close for the heat absorbsion-----

and welcome aboard------