340 Steel Crank Questions

I wish there was a pic of the flange because that sounds interesting. It may be a 3.31 stock crank but I don't think it is/was a 340 crank because of the rod throws are not drilled. It could be an old DC crank that came semi-finished so the crank pins would not have been drilled and the flange would not have been machined yet. If the "78" is a production year it would be the right year for a DC part.


Chuck