The Budd disc setup made its debut on 65 model year Dodge and Plymouth
C-body police cars. The 65 MPC lists all the p/n info with "Police"
qualifiers for every item. No mention of Chrysler models so I guess
there weren't any Chrysler cop cars.
For the 1966 model year, all Cs had the Budd disc setup availabile to
the general public.