Join us on Facebook: Search for 'ConcoursMustang' Private group!https://www.facebook.com/groups/concoursmustang/Indiana SAAC Fall Classic , French Lick, IN Oct 11-12http://www.insaac.org/SAAC National-Sanctioned Concours Event
Regarding the "H" code, from the previous pictures from the MPC, it looks like the "PGB-H, H1" was used on the full size Ford (A), Fairlane (B), and Thunderbird (S) depending on the year. I don't see any Mustang application. Note that this is in regards to the "transmission model" and may not equate to the servo identification. Just pointing it out.
H servo was used on 67 and early 68 GT 500 Shelby application.