Welcome form Oklahoma.
Looks like your hardtop is pretty original. I would sure like to see it stay that way but I also understand your desire to replicate your old 73.
Original cars - no matter the configuration - are extremely rare.
Now onto your Mustang II - That is my favorite of all Mustang II's.
I remember reading Hot Rod magazine and the article on that car.
It was - and still is - really cool. I bet that car is fun to drive!!!!
Ray