Thanks Grump. I guess I'll try that first. I have a pebble driveway and will put down plywood for the jack, and drop cloths to locate all the dropped bits that always go to the ground and never are to be found. I ordered the hex screws from Brent and will try this all in a couple of weeks when the parts arrive.
Will the float, hinge pin and needle stay in place if the top of the carb is handled in any specific way?