You can purchase fully assembled heads directly from Ford.
Steve at Tousley Ford has the updated heads in stock all the time, They've gone up a bit recently but he can still gaurantee the best price on a set of new Terminator heads or head.
I believe its just north of $1900.00 including $300.00 core charges for a pair. Shipping averages about $90.00 for the set. Divide everything in half for just one head.
They are complete, loaded heads, full valvetrain and cams already installed.
Call them at 1-800-328-9552 ask for Steve or Kevin.
U.M.