Welcome to our Forum. I believe that you will find a wealth of knowledge within it.
While 70's Mustangs are not "my specialty", there are a couple of things that I'd like to address on nyour parts for saoe, besides the Radio that Bob G pointerd out.
In regard to the Spare Tire and Wheel that you offer, I believe that the last year that Ford furnished a 7.35-14 Tire (at least from the Factory), was 1969. I believe that starting in 1970, Tires were E's, F's, G's or Radials. Hopefully someone wyo is more familiar with 73's can confirm this.
MB).I cah say, with certainty, that the Wheel is definitely not 1973, as it is dated February, 1967 (7MB).
Good luck with your parts.
Hope this helps.
Bob