Myron, Anthony,
The carb I have has the Counterbore, so hopefully the kit Scott Madson is sending me will work. Only concern I had was the idle speed screw threads break into the counterbore, I may have to chamfer the side of the bushing to get it in, if it isn't already chamfered. The shaft on mine mic's. at .212 diameter. .219 is 7/32, so maybe that is what it was originally. Scott says the kit comes with a new shaft so I'll just replace it. Kenny