Help with Mack NR14 Crane truck

[Shorty]

Hello all,

I am searching for information on Mack NR14 trucks converted
as crane carriers and used by the Royal Canadian Engineers.
I can remember seeing 2 photos of it in a book about Mack trucks,
the crane was a Dominian, if I remember it corect. Thanks a lot for
any help!

Juergen from Salzburg/Austria