Kudos to you for posting the info on your cousin. We can honor his memory for giving his all in Vietnam.
Thanks goes to Criminal Number 18F. I had tried to research some 6-7 years ago and had so many dead ends that I finally dropped it. But Criminal Number 18F gave me some very good leads that led to a situation report that listed all 11 deceased crew members and those names lead me to a treasure trove of information.