Engine Painting Help

I have my motor out of the car and on a stand. I purchased a few cans of Plasticoat 227 Pontiac metallic blue. I think I'm going to keep the Edelbrock manifold natural aluminum color.
The valave covers are new aluminum as well at the water outlet.
My question is: What should be painted pontiac blue? What should be painted black? What should be painted aluminum and clear coated???
Is there a paint scheme, or is it more to taste? I was actually going to paint everything else blue, except the water pump and timing cover, those going to be sprayed aluminum. Easy to do now since they are both off the car.
ANY SUGGESTIONS????:rolleyes:
Thanks
Chris