You realize a BA-64 would most likely not be street legal. And modifying it to become street legal would compromise the historical aspect of it.
Hand Signals are permitted if you can't use blinkers I think (may vary by state/region).. however making hand signals might be hard from the drivers position of the BA.. (might be easier to yell at your commander and have him do it)..
Owning something like a UC or Ferret would be something on my list to do when I get enough money or free time.. :]
I'm pretty sure a friend of mine just sold his ferret. He is getting a Humber from the UK to replace it, however.
may wanna check out this group:
http://www.flmvpa.org/