Page M-3 — Basic Engine Specifications – All Series – First Generation Firebird (1967, 1968, 1969)

An enhanced reproduction of the original Pontiac Sales Manual used in 1968 showrooms which described all the equipment that was available on the Firebird. This album has become a rare and valuable resource.

1968 Pontiac Sales Manual

Basic Engine Specifications – All Series

The charts below detail Pontiac’s 1968 engine application, and indicate transmission availability for each. For specific details on

engine designation and available axle ratios for all series, refer to the proper charts in the “Power Train” sub-section.

Firebirds, Tempest, Tempest, Tempest Custom, Le Mans, Tempest Safari and GTO
Engine Size (cubic inches)	250	250	350	350 H.O.	400	400	400 H.O.	400 RAM AIR
Engine Type	OHC 6, 1-BBL Regular Fuel	OHC 6, 4-BBL Premium Fuel	V-8, 2-BBL Regular Fuel	V-8, 4-BBL Premium Fuel	V-8, 4-BBL Premium Fuel	V-8, 2-BBL Regular Fuel	V-8, 4-BBL Premium Fuel	V-8, 4-BBL Premium Fuel
Engine Application	Standard on Firebird, Tempest, Tempest Custom, Le Mans and Tempest Safari	Standard on Firebird Sprint — Extra-cost Option on Tempest, Tempest Custom and Le Mans (exc. 23535)	Standard on Firebird 350 — Extra-cost Option on Tempest, Tempest Custom, Le Mans and Tempest Safari	Standard on Firebird H.O. — Extra-cost Option on Tempest, Tempest Custom and Le Mans (exc. 23535)	Standard on Firebird 400 and GTO	Optional at No Extra Cost on GTO	Extra-Cost Option on Firebird 400 and GTO	Extra-Cost Option on Firebird 400 and GTO
Transmission Availability	3-Spd. Manual or Automatic — 4-Spd. Manual (Firebird only)	3- or 4-Spd. Manual or Automatic	3-Spd., Heavy-duty 3-Spd. or 4-Spd. Manual or Automatic	3-Spd., Heavy-duty 3-Spd. or 4-Spd. Manual or Automatic	Heavy-duty 3-Spd. Manual 4-Spd. Manual or Turbo Hydra-Matic	Turbo Hydra- Matic only	Heavy-duty 3-Spd. Manual 4-Spd. Manual or Turbo Hydra-Matic	4-Spd. Manual or Turbo Hydra-Matic
Bore and Stroke (inches, nominal)	3.88 x 3.53		3.88 x 3.75		4.12 x 3.75
Horsepower	175 @ 4800 rpm	215 @ 5200 rpm	265 @ 4600 rpm	320 @ 5100 rpm	330 @ 4800 rpm (Firebird 400) — 350 @ 5000 rpm (GTO)	265 @ 4600 rpm	335 @ 5000 rpm (Firebird) — 360 @ 5100 rpm (GTO)	335 @ 5300 rpm (Firebird) — 360 @ 5400 rpm (GTO)
Torque (lb. ft.)	240 @ 2600 rpm	255 @ 3800 rpm	355 @ 2800 rpm	380 @ 3200 rpm	430 @ 3300 rpm (Firebird 400) — 450 @ 3000 rpm (GTO)	397 @ 2400 rpm	430 @ 3400 rpm (Firebird) — 445 @ 3600 rpm (GTO)	430 @ 3600 rpm (Firebird) — 445 @ 3800 rpm (GTO)
Compression Ratio	9.0:1	10.5:1	9.2:1	10.5:1	10.75:1	8.6:1	10.75:1
Cooling System Capacity	12.1 Quarts		18.6 Quarts		17.8 Quarts
Oil Capacity (less filter refill)	5 Quarts
Fuel Tank Capacity	Firebirds-18.5 – All Others-21.5 Gallons

Catalina, Executive, Bonneville and Grank Prix
Engine Size (cubic inches)	400	400	400	400	428	428 H.O.
Engine Type	V-8, 2-BBL Premium Fuel	V-8, 2-BBL Regular Fuel	V-8, 4-BBL Premium Fuel	V-8, 4-BBL Premium Fuel	V-8, 4-BBL Premium Fuel	V-8, 4-BBL Premium Fuel
Engine Application	Standard on Catalina and Executive	Optional at No Extra Cost on Catalina, Executive, Bonneville and Grand Prix	Standard on Bonneville — Extra-cost Option on Catalina and Executive	Standard on Grand Prix	Extra-cost Option on Catalina, Executive, Bonneville and Grand Prix	Extra-cost Option on Catalina, Executive, Bonneville and Grand Prix (exc. Sta. Wgns.)
Transmission Availability	3-Spd. Manual or Turbo Hydra- Matic	Turbo Hydra- Matic	3-Spd. Manual or Turbo Hydra- Matic	3-Spd. Manual or Turbo Hydra- Matic	3- or 4-Spd. Manual or Turbo Hydra-Matic	3- or 4-Spd. Manual or Turbo Hydra-Matic
Bore and Stroke (inches, nominal)	4.12 x 3.75				4.12 x 4.00
Horsepower	290 @ 4600 rpm	265 @ 4600 rpm	340 @ 4800 rpm	350 @ 5000 rpm	375 @ 4800 rpm	390 @ 5200 rpm
Torque (lb. ft.)	428 @ 2500 rpm	397 @ 2400 rpm	445 @ 2900 rpm	445 @ 3000 rpm	472 @ 3200 rpm	465 @ 3400 rpm
Compression Ratio	10.5:1	8.6:1	10.5:1	10.5:1	10.5:1	10.75:1
Cooling System Capacity	18.0 Quarts			18.6 Quarts	17.2 Quarts
Oil Capacity (less filter refill)	5 Quarts
Fuel Tank Capacity	All, Exc. Station Wagons-26.5 – Station Wagons-24 Gallons