I use them for antennas myself. I have a tube of them.
As far as I know the Army called their vehicles a V-100. I never heard them call it a 706.
Other names were "Pig", "Duck", or "Rubber Duckie", the last two after the song from Bert's song "Rubber Duckie". They were good vehicles but lightly armored being only able to handle up to a .30 cal machinegun, or perhaps a little more. Their slanted armor and speed were its best defense. We would have loved to have a gun turreton at least a few of our vehicles ofer the parapit armor.
One thing that is wrong is the tow/winch system. We had cables, not chains. I never understood why H.B. put in a chain.
One other is they forgot to have a second bilge vent on the right side. Unless teh Army only had one.
quick question, is your figure supposed to be wearing jungle boots or stateside boots? We used both when necessary, but it could be the time period of the figure.
I recently converted this kit into the Air Force M-706 which was a major amount of work.
I took it to our last club meeting and was told by a another VIet-vet that my model was too clean. I told him he was thinking Army. My vehicle was A.F. and we had to clean our vehicles before turning them in each day.