Discussion:
https://talk.classicparts.com/threads/spare-tire-carrier-assembly-confusi.616/

You need these pieces (picture) plus J-hook & washer-nut. I copied the picture and failed to note the author's name.

If money is no object, here are 3 of the 4 pieces available now at auction:
https://www.ebay.com/itm/275365319147
Attachments
31.jpg (101.36 KB, 266 downloads)

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."