crank identity??

I may be wrong, but it looks to me, from the net, that only the Forged units have the number ending with the "6123"...(rod size?). They also look to start with a 4 in front of the 360 vs a 10 in front on the cast units.

You could just call them?
http://www.eaglerod.com/index.php?option=com_content&task=view&id=23&Itemid=25