HS-4 carburetors.

I rebuilt these and installed them in my 1972 MGB Roadster. These are actually from the late sixties, chosen because of their simpler design; they have regular butterfly valve plates (none of the spring-loaded smog valves that decrease throttle response and lessen intake flow volume) and do not have the temperature-compensated jets and needles.

float bowl cover

full view

linkages

top angle

top angle 2