Wanted to ad that , for every 1960 I've converted, the intake was not drilled which prevented the carb port from having vacuum. I believe '61 was a transition year and may or may not be drilled. I've never seen a '62 or later that wasn't drilled which is why I say '61 may be a transition year. It was an easy enough fix but requires removing the carb and drilling a hole in the intake. Also easy to check just remove the plug on the carb port you were going to hook it to while it's running to confirm there is suction.
