I may do that. I am freshening up the original carburetor on my friends 1970 Z/28. Had some leaks. Also appears like the choke well is leaking hot gases as the vacuum secondary diaphragm and fast idle choke cam were melted some. I feel weird leaving out two screws on his carb. As I mentioned, the long ones seem to have come from the center holes. But those holes don't appear to be deep enough to accept longer screws. I don't want one to find its way into the engine. So I think I am going to leave them out.