I believe Ryan has them set up for 0.002 press. Yes, Ryan took the crush into account when honing. I know he said the #5 came right on where he wanted it after installing it.

Yes, this id the final bearing surface the cam will ride on.

You might be able to use Bronze, I don't know. Ryan researched what other people have typically done in the past for something like this, and they have been 850 alloy aluminum. High tin content. The oil clearance he said is typically set up looser than babit. He was shooting for 0.002-0.003 oil clearance, for this setup.