Feel like 360 should have more power

Doh!
yeah so the cylinder pressure looks to be about the same as if you were blowing up balloons for your daughters 4th birthday party, lol.

Yes I read 6200 and that is your biggest enemy.
To get pressure that low the cam would have to have about the same Ica as the stock 2bbl cam and the Scr less than 8.4.
Same combo at sealevel should pump 140psi, still a slug...... IMO.
You need a supercharger up there.

eschewing that solution, will likely cost more, cuz it means a whole new engine, whereas at 8/1 or perhaps a tiny bit more, you are already in pretty good shape for a super.

At 6200ft your NA build would have to be specific to that elevation, and might not survive long at typical sub 1000ft elevations.