jowens1126, your illustration shows the support bracket used on Mach 1's built before 6/14/71 with two vertical supports. If that is the one you are using you will need two "8182" brackets. They fasten to each vertical support and the grill fastens to the front of the 8182 bracket. The after 6/14/71 set up used a single vertical support so only one 8182 bracket would be needed. I would suggest contacting Don @ Ohio Mustang Supply or Mike @ Motor City Mustang to see if they might have some nice used ones. If not maybe some forum members such as rackerm may have some in their parts inventory.
On the pre 6/14/71 Mustang, the 16707 (Hood Latch Support) and 16747 ( Latch Support Brace) were separate pieces. The after 6/14/71 version used a one piece latch support that replaced the discontinued separate support and brace and carried a 72 part number. The hood latch stayed the same for 71-72 so your existing latch will work on either version.
jowens1126, I'm out of state presently and am not able to take a picture of one I have. Hopefully a catalog illustration will help. The single vertical support brace is spot welded in the center of the latch support and would attach to the lower part of the radiator support like the early versions with two supports did. Any of the grills you find now should have holes for either version that you may find. This version will still need a 8182 bracket.
The latch support you need for your grill project is defiantly another 71-73 "Unicorn" part. Just in case you don't hear from anyone here on the forum, I decided to post a couple of links that might help. The first is Mustang's Unlimited. I will tell you that I have requested some price quotes on several parts a few times and never heard from them. Never tried to call them as I felt they posted their part on the site, they should monitor it . http://www.rearcounter.com/D2ZZ-16747-A-parts438974.html
1971 Mach 1, Grabber Blue w/Argent stripes. Original 2V 351C Auto, Tilt, rear defog, Black Comfortweave Interior. Under restoration. Original colors, 4V 351C, 4-Speed, Spoilers, Magnums, Ram Air. All Ford parts.
jowens1126, did you ever contact kcmash on the one he may have? The two links I posted still show inventory, IF they still have them is another story! None are being reproduced that I know of and I just haven't seen many for sale. A lot of em' were damaged during front end collisions and many were lost when the 71-73's were being crushed back when they were considered much like the 74-78 Mustang II's as "Not real Mustang's"!
I did but got no response. He did say he was slow to respond, so Maybe he will pop back up soon. The one link to 2020 parts wouldn't let you buy the part, it said it's an outdated posting. I didn't contact rear counter yet.
Thanks to Don at OMS for getting me the parts I needed to complete this project. I am so thankful that he was able to locate all of the parts I needed. Hopefully this weekend I can get some time to install the new front grill!