core 'revision' number...BS? BUSTED!!

Core shift is when one bank of cylinders has a heavier wall on one side (example) as if the sand core was not centered in the drag (lower part of box) as they were cast upside down. It can be seen in the cam tunnel as a slight offset. I know they cast 4 in one pouring, but perhaps the foundry had 2 or more pour stations for up to 8 or more cavities. I've had a -6 and and a -8