This is my first BBC, so I am full of questions...

I have an 84 454 out of a C30 towtruck. It came with a 12" flywheel / clutch set up. I plan to use a smaller gen 3 camaro bellhousing so I believe a flywheel, clutch and pressure plate swap is in my future. My question is about the balance? Is my engine internally or externally balanced? Can I just purchase another smaller flywheel? What do I need to be looking for?

Anyone looking for a 12" set up and want to swap?