Can anyone tell me the correct diameter of the crankshaft (where rods connect) for a 51 B? I measured 2.746" and 2.747" and think that might be less than manufacturers spec? I put standard insert bearings on B3201R rods with no shims torqued 75lb and still not tight enough. It was stuck when i bought it and think the crankshaft mush have been worked on? Any suggestions? Thanks for the help.
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