[dswancutt]

I have a Bonanza catalog for 1978. Basically it was a package offered for the slow Jan to march months.
There where 4 levels of Bonanza trim.

YG6 - Scottsdale trim package plus:
Bonanza trim plates
color key carpet
Striped vinyl bench seat
Deluxe wheel covers on C & K10
Chromed grille
Bright body side moldings
Full gauge instruments
Clock, AM Radio

YG7 - All of the YG6 package plus:
Automatic transmission
Power steering
Tilt wheel
Inside hood release

YG8 - YG7 package plus:
Tinted glass
Air Conditioning
Cargo Lamp

YG9 - YG7 pagkage plus:
Operating convenience group
Cruise control

Each of these packages offered savings on the options if ordered seperately.

Hope this helps