Alex-
From your message title, you'd be better of searching for VM
F-312 as that was the squadron designation at the time.
In the meantime for your viewing pleasure there's a nice color shot of one landing on USS Sicily here
https://www.thisdayinaviation.com/tag/vmf-312/
On the other hand, if you're looking for VM
F-321 as in the text of your message, there's always
https://www.koreanwar2.org/kwp2/usmc...nce/vmf321.pdf
VMFA re-designations of VMF squadrons did not come along until the mid 1970's.