rod: 6.123
crank: cast=external balance(flywheel/converter/harmonic=weighted)
1968-1971: forged crank, part number 2532457, 2128869, or 2843868; service part number, 2843868
1972-73: cast crank, 3462387, 3658393, or 3751841 (some 1974-86 cast cranks use the same 3462387 casting number as...