so i have 600 miles on rebuild been playing with carb trying to get it tuned everthings been fine. well i start it up to day and i have a knock from lower in goes away and higer rpm but bad a idle drop oil pan and found this with some markings dings on rod caps 1 and 4 [Linked Image]
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owned a few .. current 86 rustbucket 2.5td . manual hubs