You are correct about the DC1-4 markings on the other side of the flywheel. Thank you very much for the clarification.
Do you happen to know anything about how the flywheel on a U302 should be put on (i.e. DC markings lined up on bellhousing when #1 & #4 pistons are TDC or when #2 & #3 are TDC?
Thanks again for all your help.