Designed by Richard Teague
The
1953 Packard Balboa-X, as it was officially called, was a hardtop based
on the Packard Caribbean convertible. The main point of interest on the
car was the canopy-style C-pillar. Caribbeans never recieved a hardtop
like the Balboa's, but they got a conventional one (covered with
Hypalon) in 1956.
Drivetrain of the Balboa-X was stock Caribbean
with a 327 c.i. Straight Eight that was distinguished from lesser
Clippers Deluxe's engine by hydraulic valve train adjustment, and from
the more expensive Patrician 327 by 5 instead of 9 main bearings.
Source: Internet