The No46 cylinder head was...
The No46 cylinder head was used on most '73-'74 350ci applications. It was, however, the only casting used on the GTO 350ci in 1974. Not to be confused with earlier castings from 1969, the '73-'74 No46s also had small intake and exhaust valves but received threaded rocker arm studs after mid-May 1973.
Regardless of its block code, all GTO engines received cylinder head casting No. 46 with a secondary application stamp of 6H. These heads have 1.96-/1.66-inch valves and a combustion chamber volume of approximately 96cc producing a compression ratio of 7.6:1. Many believe the GTO received a unique No. 46 head with threaded rocker arm studs. But as we learned in "Heading for Controversy" (Dec. '03 HPP), all production heads assembled after May 7, 1973, received threaded studs-which means the GTO No. 46 heads are the same as those found on any other non-GTO 350ci.
Atop the cylinder heads were a cast-iron four-barrel intake manifold and a Rochester Quadra-jet carburetor. Backing the small-displacement mill were three transmissions from which buyers could choose-the standard M11 three-speed manual, the optional M20 four-speed manual, and the optional M38 automatic transmission. Power was transferred to the pavement through a leaf-sprung 8.5-inch GM 10-bolt rearend with 3.08 gears. The G80 limited-slip differential was an extra-cost option.
Reminiscent of earlier GTOs,...
Reminiscent of earlier GTOs, many '74 models were equipped with chromed exhaust splitters. But some, like that tested in the May '74 issue of Cars magazine, received standard Ventura tailpipes without any exhaust trim whatsoever. The June 1975-dated Master Parts Catalog lists two separate tailpipe part numbers for GTO applications-one for "'74 X/GTO" with exhaust tips and one without. A specific pattern has yet to be determined, currently leaving box No23 on the buildsheet as the only way to tell if a respective GTO originally received chrome splitters.
The GTO package included the F41 Special Performance Suspension comprised of a 0.812-inch front swaybar, a 0.562-inch rear swaybar, firm-ride shocks, and 14x6-inch Rally II wheels without trim rings. The standard tire was an E70x14 blackwall, but white-lined or white-lettered tires were available at extra cost. Buyers opting to further improve ride and handling could order FR78x14 steel belted radials with either white lines or white letters-both included Radial Tuned Suspension that boasted of computer selected front and rear springs to maximize the effect of radial tires when combined with the F41 suspension.
As with other Ventura models, manual steering and drum brakes were standard on the GTO, but J50 power drum and JL2 power front disc brakes were available at extra cost. N41 power steering was another extra cost option. It was, however, required on any air condition-equipped Ventura model. Among other options were three different steering wheels-the basic two-spoke was standard on the base Ventura while the three-spoke Custom Cushion was standard on the Ventura Custom. The three-spoke Custom Sport was optional on either.
In its May 1974 issue, Cars magazine compared a well-optioned '74 GTO complete with four-speed manual transmission and 3.08 gears to a '64 GTO with a 389 four-barrel engine, automatic transmission, and 3.55 gears. Pontiac performance legend Nunzi Romano of Nunzi's Automotive in Brooklyn, New York, was on hand to perform the comparison. With Romano behind the wheel, the '74 posted a best quarter-mile pass of 15.72 seconds at 88 mph, while the '64 model was slightly quicker, turning 15.64 at 90 mph. Zero-to-60-mph times for the two were similar at 7.7 and 7.4 seconds, respectively. But even though the new model was not as quick, writers raved not only about its performance balance, but also how much ride and handling had improved since its inception.
Very little separated the...
Very little separated the GTO's interior from the Ventura's. A cloth-covered bench seat was standard while vinyl covering or buckets were optional. One option-U17 Rally Gauge Cluster and Tachometer-required the D55 Front Seat Console and A51 Bucket Seats. Gauges were located on the console and allowed the driver to monitor the engine's vitals. The tachometer was just left of the speedometer in the void left by the displaced fuel gauge. Few convenience options were standard, and some, such as power windows, power door locks, and the stereo tape player were not available at all.
Even with less displacement and output than larger 455ci engines from the same year, the smaller body allowed the '74 GTO to perform similarly to its predecessors. Not laden with standard convenience options and power-robbing accessories, a sharp buyer wanting a lightweight street fighter could easily select the proper options to create a boulevard racer running stoplight-to-stoplight with many comparable cars of its time.
Some hobbyists who own earlier-model-year GTOs consider the '74 as the proverbial red-headed stepchild within the GTO family tree. Just 7,058 were built during the '74 model year. Total production numbers can be broken down to 687 hatchbacks with manual transmission, 1,036 hatchbacks with automatic transmission, 2,487 coupes with manual transmission, and 2,848 coupes with automatic transmission. But when you consider that only 4,806 A-body GTOs were built during the '73 model year, it appears the smaller, X-body GTO may have offered to buyers more practicality than earlier models.
As with most cars of its day, the '74 GTO was not considered an instant collectors item, nor did many survive their tour of duty. Even though clean, original examples like that featured here can still be found, many unknowing enthusiasts still regard them as nothing more than a glorified Nova and rarely give them a second look on the show field. Only now, while in the midst of the new GTO era, might we realize how much effort Pontiac set forth in 1974 to retain the GTO nameplate without it becoming another decal package. But no matter how you perceive the '74 GTO, no one can deny it closed a glorious chapter in Pontiac history. After all, it was the last GTO for 30 years.
Optional on all Ventura models...
Optional on all Ventura models including the GTO, UPC D98 Vinyl Accent Stripes added $41 to the bottom line and were also color coordinated matching the "GTO" decals. The stripes start on the fender and extend rearward to the quarter-reminiscent of those installed on the '69 GTO Judge.
The Admiralty Blue '74 GTO featured in our article belongs to Tom Nelson of Yankton, South Dakota. Tom purchased his car in 1994 at a young age and continued to drive it until a full restoration could be performed. It was completely dis-assembled and fully detailed to create its stunning appearance today. After several years and countless hours of hard work, Tom's GTO is now limited to light street and show duty.