I,m rebuilding a 7.3 97 model it cracked a piston so while im in it. Im going to build the whole engine. The rod and main bearings dont have markings that Im famillar with, wondering if anyone knows.The bearing has a part#1812020c1 with 09W on top of that. And 0-04 on the other end of the bearing. Trying to figure out if standerd or oversize. Also has anyone seen one of these engines crack a piston before. This truck I know little about it has 300000 miles but as i was taking motor I found markings on engine block like it came from a Junkyard. Any help is greatly appreciated. Thanks Poobear