I wonder what it's gonna do through the cast iron manifolds? Did you use a cam with that in mind? I'm not competent on cam selection, or anything else engine related for that matter. LOL. I did see what you used.
Probably 25-40hp loss through the exhaust manifolds--Yes I chose that cam with the manifolds in mind--take a look at the specs I posted-you should be able to see it. J.Rob