It's easy to fit an later model choke cover to an early Q-Jet. The problem is finding one for a Chevy engine that has the integral choke in the carburetor. Most of the OEM Chevy carbs have a divorced choke mounted to the manifold heat riser passageway. I have used a carb for a Buick 350 at times, and converted the choke cover to the electric heated type. Don't use the gasket under the cover- - - -it prevents the heater coil from getting a ground, and plug off the vacuum port to prevent a constant leak. Route the voltage through an oil pressure switch so the choke heat shuts off in case the engine stalls during warmup.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!