What camshaft should I use?

Yes the shaft bolts.

The car was allowed to warm up for 10 minutes. I dropped the idle down to about 300-400 and then I popped the valve cover off. Intake was set to .010” and exhaust to .020” while running.

I absolutely hate adjusting valves running. I will not do it. It can be dangerous if you're not very careful. I adjust them cold so as not to get burned. They only change "about" .002" when warmed up and that's not going to affect a thing. Sounds like you got it right though. Do you get they rhythmic pop through the carburetor upon a load?