Jim, sorry I do not have any of the dimensions you asked for. The pin boss cleared fine. The interference was a little farther down the curve of the skirt. I don't know what the counter weight diameter is either. The crank is a Crower and when we ordered it they asked for the rod length we were going to use to cut the counter weight. The tag that came with the crank says CWT Cut for 6.536 Rod C-C. Sorry I couldn't be of more help.