I can't answer the Chev question for sure because all I've ever owned was GMC. But I have heard of people making the conversion. I just don't know what's involved. As for the governor, they were supposed to work on velocity and cut back on the throttle at a specified RPM. By the late 50's, most of them didn't work correctly any more. I would suspect less to work properly now. When I got a V8 GMC, it had a tea pot Holley with a governor. I threw away the Holley along with the adapter and installed an Olds Rochester and it made a world of difference.