do you think this site is "Alan"
http://wacasawakan.com/
they only list 1 1/4", 1 1/2" and 1 3/4"
there was no 1 3/8".
Given the ease in installation you show, and with a rebuilt engine, seems like it should be a "must do". that would be a LOT simpler that what I was thinking, it still looks stock and could be removed.
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