Cleaning the Intake Manifold? Options

[mark95turbo]

OK. So Ive got the head off and took the intake manifold off. As I stated before the intake mani is absolutely caked inside with grime from the EGR. Any tips on cleaning it? I sprayed it down with brake parts cleaner and used a method close to the Intercooler cleaning process (fill shake pour, fill shake pour, etc.) and its still caked inside. Is there something that would be better for cleaning this gunk off? Im gonna see if I can find a long brush of some sort and scrub it out. Anything else I should clean up while Ive got the head off? Would it be safe to spray the head to block surface down and scrub it a bit? Can I scrub the cyls off a bit? Thanks for the info!