AFAIK the change over was between 80 and 81. Not sure if the cranks are swappable or not. Ken Quoting 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 > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20130325/f041eb13/attachment.htm> > _______________________________________________ > AMC-list mailing list > AMC-list@xxxxxxxxxxxxxxxxx > http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com > _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com