Very good info Andy. Most of us don't just do the head so that gives a great insight into what can be had by improving that single most important thing. Moral of the story: start with the head then work your way downward!
I'd like to see what it would dyno next with a Kerker and competition baffle to replace the stock header with the Mac tail piece, then cam, then pistons.
Isn't John Goulet a member? Name's familiar.
