The real fit issues, (I.M.O.) are at the front at the firewall. If you want to start exploring this then you can learn a lot with just the block and the front cover.
I've cut the firewall so that it's symmetrical.
Extends as far on the drivers side as the passengers side. I have not changed the passenger side just the drivers.
In this picture the engine is nose down about 1 Degree. I think I can avoid notching the top of the firewall if I set it at 1.5 Deg Down. It will be very close so....not holding my breath.