[AMC-list] 258 crankshaft differences

[russ hathaway <russh97309@xxxxxxxxx>]

What year did AMC switch crankshaft designs? They had the big counterweights in the early years, then went to smallers weights towards the end. What year did they switch over?
I have a 1980 258 in need of a bottom end and a good 83 crank......Russ
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