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I also find somthing else interesting about these belt pulleys. I have another 350 sdl engine sitting in the corner of my garage and it has an additional pulley that is mounted above the top most portion of the belt that rides on the complete top of the belt and adds a little tension by pushing down on the upper portion of the belt. (did that make since?) Mine does not have this pulley and I have looked at several other sdls and they dont seem to have it either. Does anyone else have this pulley? Maybe it was an upgrade?
Maybe I will try and post a pic of this
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