I've never seen Shelby heads before
The pins/rivets, are going to keep those freeze plugs firmly in place
There is a beauty to machined parts
That is a cool procedure, having just a pair of engine builders at most make your engine, and then they put their name on it. That's pride in the work friends.
http://justacarguy.blogspot.com/2009/02/high-performance-engine-building.html for the wallpaper quality photos I thought you might like, and thanks to J Bittle for the open house tour of the JBA machine shop!
http://justacarguy.blogspot.com/2009/02/open-house-tour-for-mustang-club-at-jba.html and for last summer's open house at the Convoy St car shop: http://justacarguy.blogspot.com/search?q=jba+open+house+