Comments: The success of the 1964 Pontiac GTO encouraged Buick to produce a muscle car of their own. General Motors placed a corporate maximum of 400 cubic inches in their intermediates, but Buick just shoehorned their existing 401 cubic inch fullsize car engine into their Skylark to create the Buick Skylark Gran Sport. Called the Wildcat 445 (due to its torque rating), this Buick engine dated back to the 1950s and was known as the "nail head engine" due to the size of its valves. All Skylark Gran Sports, hardtop, pillared coupe, and convertible, received the convertible's beefed up frame and a special suspension. The model was an instant success and almost 16,000 were sold in 1965. Not bad for a first try.

Production:
2D Coupe: 2,282
2D Hardtop: 11,351
Convertible: 2,147

Engines:
401 V8 325 bhp @ 4,400rpm, 445 lb-ft @ 2,800 rpm.

Performance:
401/325bhp: 0-60 in 7.8 sec, 1/4 mile in 16.6 sec @ 86 mph.

Comments: The 1966 Buick Skylark Gran Sport received more power and new styling for its second season. All Skylarks gained new rear slooping sail panels that extended the rear roofline beyond the back window while Gran Sports were distinguished by blacked out grilles, GS badging, nonfunctional rear-facing hood scoops, and simulated front fender vents. The old 401 engine returned producing 325bhp, but now there was a hotter 340 bhp version. This engine dropped 0-60 and 1/4 mile times by 1 second and 1/2 second respectively. Despite these improvements, the Buick's higher price compared to other GM intermediates resulted in a large drop in production, as only 13,816 were produced.

Production:
2D Coupe: 1,835
2D Hardtop: 9,934
Convertible: 2,047

Engines:
401 V8 325 bhp @ 4,400rpm, 445 lb-ft @ 2,800 rpm.
401 V8 340 bhp @ 4,600rpm, 445 lb-ft @ 3,200 rpm.

Performance:
401/325bhp: 0-60 in 7.6 sec, 1/4 mile in 15.47 sec @ 90.5 mph.

Comments: The MSRP for the 1970 AMX increased to $3,395. For the added money, the buyer got a standard 360 cid V8 rated at an impressive 290 bhp. The front end and taillamps were also completely restyled. Atop the hood was a Ram-Air induction scoop. This would be the last year for true two-seat AMX production.

Production: 4,116
Engines: 360 V8 290 bhp. 390 V8 315 bhp.
Performance:

Comments: The two seat AMX ended in 1970 as the 1971 AMX was now technically the top of the line Javelin. The new AMX shared the four-seat Javelin's new swooping, bulging appearance and styling with "humped" front fenders and a rear-facing cowl hood. Also standard were high-back bucket seats, a center console, slot style wheels with fat tires and a rear spoiler. Engine options started with a 360 cid V8 with two-barrel carb rated at 245 bhp. The optional "Go Package" added a 401 cid V8 with four-barrel carb, heavy-duty cooling, functional cowl-induction system, Twin-Grip power disc brakes, E60-15 white letter tires, 15x7 styled wheels, space saver spare and dual exhausts.

Production: 2,054
Engines: 360 V8 245 bhp. 360 V8 290 bhp. 401 V8 330 bhp.
Performance:

Comments: 1972 saw small styling changes, including a specific grille which matched the center-bulge horizontal blade pattern for 1971. This year's base engine was a 304 cid engine, with only a 8.4:1 compression ratio and was rated at a mere 150 bhp. Still available were the 360 cid and 401 cid V8 engines. Torque-Command automatic transmission, with floor shift, was optional on any engine, and a four speed manual transmission was optional on the 360 and 401 engines. Still available was the "Go Package" with its standard 401 engine and functional cowl-induction hood. Although the AMX would technically continue to 1974, this was the last year for muscle car engines and muscle car performance.

Production: 3,220
Engines: 304 V8 150 bhp. 360 V8 245 bhp. 360 V8 290 bhp. 401 V8 330 bhp.
Performance: