Thanks, Mr. Green! I'm plodding along with it. LOL
I share your opinion about the '71-'73 Mustang, especially the fastback(Sportsroof).
In the Cougars, my favorite is the '67-'68 body style.
I used the engine block, trans, and heads for this build:
The induction setup came from the Cougar kit. The distributor is from Kris Morgan at MAD.
Test fit in the engine bay: