Help me build my 360!

This thread has opened up some questions for me. Please forgive my ignorance, I have no experience in going this far with an engine.

1) Is my current harmonic balancer is an external or internal balanced?

2) I thought to have an internally balanced 360 was very expensive (Mallory metal?) to do the balancing. Is this incorrect? To have an internally balanced 360, can I just get a neutral balanced crank, harmonic balancer, and flex plate? Use the stock rods and the KB 107 pistons? Can the stock crank be used to make an internally balanced engine?

3) I see that the 4.00” stroke cranks really aren’t much more than the 3.58” stroke cranks. Can I use my stock rods with some sort of shorter pistons to make a stroker? Are the 4.00” stroke cranks harder to make internally balanced?

4) What are the purpose of undersize main and rod bearings? (I saw those choices when looking at the price of bearings). Are rod and main bearings hard to install?

5) I was under the impression that when using iron heads, you didn’t want to make the CR much more that 9.5:1, or you couldn’t use pump gas. Apparently the iron magnum heads can take more compression and still use pump gas.

6) Am I over my head with this project? I think I can do this, but I want to do it right the first time.

7) How much can you deck the block before the intake manifold has a hard time sealing?