Those photos are good for the exterior. The car has a TZ1/TZ2 chassis.
It was in the USA(california) until the mid 1980's when it was sold off to Japan. The sister TZ1/TZ2 Canguro was also owned by an American serviceman who also has now sold it off to Japan. Seems to be a pattern here!! They are both back in perfect condition.
I think there is enough information about the Bertone Canguro since it was shown at the 2005 Concorso d'Eleganza Villa d'Este.
I found quite strange why there is so little, at least on-line, about the Pininfarina car.