Blood Enterprises is a very good Facility complete with dyno.
www.bloodenterprises.com
Lots of mustang and cobra replica experience.
Another good place is Brads Custom Auto. In Lake City. Also with great mustang (302ci) experience.
www.bradscustomauto.com
Both these facilities us DAVE BLISS to do all machine and ballance work. Dave Bliss is the man! Just ask anyone driving a ford on any NW race track.
I personally think that for reasonably built motors. you cannot beat a SVO ford crate motor. I am good pals with Craig Blood in Auburn and I've seen them insert many of them and the results are good. Not to mention it is not as time consuming as the typical engine build when done by the popular shops.
Hope that helps.