1964 production
information
Production by Engine:
389 ci 4 bbl V8                24,205
389 ci 3x2 bbl V8            8,245

Production by Body:
Coupe                7,384
Hardtop             18,422
Convertible        6,644

Total:        32,450    

Engine Block Codes:

78X, 78XX for 389 ci 325 hp 3-speed
78W, 78XW for 389 ci 325 hp 4-speed
78X9, 78W9 for 389 ci 325 hp 4-speed with 3.90:1
gears
79J for 389 ci 325 hp 2-speed automatic
76X, 76XX for 389 ci 348 hp 3-speed
76W, 76XW for 389 ci 348 hp 4-speed
76X9, 76W9 for 389 ci 348 hp w-speed with 3.90:1
gears
77J for 389 ci 348 hp 2-speed automatic

Cylinder Head  Casting Numbers:
9770716 for 389 ci

Distributors:
1111054 for regular ignition
1111057 for transistor ignition

Carburetors:
3647S for 389 ci 325 hp manual
3649S for 389 325 hp automatic
7024178 front, 7024173 center, 7024179 rear for 389 ci
348 hp manual
7024178 front, 7024173 center, 7024179 rear for 389 ci
348 hp automatic
© GTO is a registered trademark of the General Motors Corporation & Pontiac.  
Neither Pontiac nor any subsidiaries of GM© shall bear any responsibility for
www.pontiac-gtos.com content, comments, or advertising. www.pontiac-gtos.com is
independent from GM© and is not affiliated with, sponsored or supported by GM©.  
Copyright/trademark/sales mark infringements are not intended, or implied.  All
Rights Reserved.  The information in www.pontiac-gtos.com is accurate to the best
of our knowledge.  The information in this site is not guaranteed, and we disclaim
any liability incurred in connection with the use of this data.

Contact Information

Site Map