differences between 66/67 and 71/72 GTO - Pontiac GTO Forum
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post #1 of 6 (permalink) Old 03-29-2005, 09:36 PM Thread Starter
 
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differences between 66/67 and 71/72 GTO

what r the differences between the 66 and the 67 gto and the difference in the 71 and 72 gto...
thx for the info
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post #2 of 6 (permalink) Old 03-30-2005, 06:57 AM
 
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There are a couple of visible differences in the 66-67 models.

The taillights are different and the side GTO emblems on the 66 are on the body instead of the rocker panel. Also the front grills were blacked out in 66 and left stainless in 67.

Under the hood, the 389 tri-power was dropped in favor of the 400 with a 4 barrel carb.
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post #3 of 6 (permalink) Old 03-30-2005, 09:23 AM
 
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As SAND noted, the big difference between the 66 and 67 GTO is the engine: The 67 was the first year for the 400. '66 was the last year for multiple carbs (Tripower), and the Corvette was the only GM car that was allowed multiple carbs after '66. '67 was the first year for the 750cfm QuadraJet carb, and the H.O. 400 engine cranked out the same 360 hp rating as the 389 Tripower from '66. Along with the bigger engine came a better automatic tranny: the Powerglide 2-speed was discontinued after the '66 model year and the GTO received the Turbo 400 3-speed automatic in '67.

Changes from 71 to 72 were mostly cosmetic: The wire mesh grill from '71 was replaced by a deep-set plastic grill in '72, and the GTO received fender air extractors. 72 marked a further decrease in performance, as the standard 400 engine dropped from its 300-horse rating in '71 to 250 horse in '72. The 455 H.O. from '71 (rated at 335 horse) was continued into '72, but dropped to 300 horse. 2 of the rear axle ratios from 1971 were not continued into 1972: You could not get a 3.90:1 or a 4.33:1 Limted Slip axle in '72. In spite of lower power numbers, the 72 GTO is actually a very nice driving car: It's smooth, handles well, and it actually stops.
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post #4 of 6 (permalink) Old 03-30-2005, 08:17 PM Thread Starter
 
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thx a lot guys, i asked because im planning to purchase a GTO and the ones i like are the 66' to 72' gto, as a lot of ppl.
and another thing, lars, when u said the '72 is a nice driving car, do u mean the 72 feels better to drive than the 71, despite the horsepower decrease ?

either way 66 or 67 seems like the way to go, although they can be expensive.

thx
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post #5 of 6 (permalink) Old 03-31-2005, 11:17 AM
 
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I've owned both 71 and 72 GTOs, and I find the 72 to be a better overall balanced car in terms of the "total feel" and refinement. It's not tough to alter the power rating with a little engine tuning and tweaking, so I wouldn't worry too much about the power drop of the '72: that just gives you something to play with to put some life in it...
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post #6 of 6 (permalink) Old 04-01-2005, 11:40 AM
 
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Also, The Stainlees trim on the Rocker panels on the 67 are wider. They conform to the body lines. The rear of the Quarter panels are "rounded" off when compared to the 66.
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