[1fastfx]

81 shovelhead.Over the years i have had three to four sets of 80-81 shovelheads have the crankpin shot crooked.You could tell that there was something weird when you saw the pattern in the cylinder wear.Looks like a gyroscopic wear pattern on the cylinder bore instead of a straight scuff. Pull the wheels out and put them on a truing stand and they were not that bad,not bad enough to see what i saw in the cyl.
First years of the commonised crank pin.I dont care how well you reballance it,This thing will shake.