Was wondering if anyone whos more experienced with a complete rebuild of these engines could give me some tips on how to split the case?

I've removed all the bolts that hold both half's together, but cant seem to split it. And before I cause damage to my block id rather consult with some more experienced boxer guys.

I've tried hitting both sides individually with a deadblow rubber hammer, as well as tried hitting a bolt I partially threaded back into one side. Neither even budged it.

Double check that you found all of the bolts. There are a couple of sneaky ones.

Yup. Thank you. Three bolts we missed because of their odd location.