While maintaining a basic resemblance to previous Mustangs, the 1971 Mustangs were the largest and heaviest yet. Every dimension increased; Wheelbase was stretched to 109 inches.

Engine choice still remained high; a total of ten different engines were available on the 1971 Mastang.

Base engine was the 250 ci six-cylinder on all models except the Mach 1 which came with the 210 hp 302 and the Boss 351 which got a 330 hp version of the 351.

1970 Mustangs were mildly restyled. Headlight configuration reverted to a single seven-inch lamp on each side, this time inside the grille opening, Simulated scoops took the place of the outside headlights. The rear taillight panel was flat rather than concave and the taillights are recessed.

FRONT SPOILER:
Here's a performance feature that's standard on the BOSS yet not even available on some Trans-AM competitors. a functional front spoiler. This unit helps to keep air out from under the car, make it more stable, cut drag and even increase gas mileage. It's effective at speeds in excess of 40 miles per hour and a real plus when operating on the track

4-SPEED TRANSMISSION:

1969 was the second major restyle for the Mustang. Every dimension increased with the exception of wheelbase (it remainedat 108 inches) and height, which was lowered by 1 1/2 inches.

Including the two Boss engines, there was a total of ten differentengines available. Headlight configuration for the first time went to four, four-inch units. The fastback body style, called SportsRoof, came with simulated rear side scoops and a spoilered rear. Convertibles and hardtops used a simulated rear quarter panel vent.

Models:
Coupe, Hatchback, Cobra II

Engine Types:
2.3L 4 Cylinder, 2.8L 6 Cylinder, 5.0L V8

Transmission:
3 Speed/4speed or Automatic

Produced:
187,567 Mustang II's

Of Note:
The 5.0L V8 was born!

Models:
Coupe, Hatchback, Mach I

Engine Types:
2.3L 4 Cylinder, 2.8L 6 Cylinder - Optional V8 122HP

Transmission:
3 Speed or Automatic

Produced:
188,575 Mustang II's

Of Note:
The V8 block was introduced once more, but due to much needed fuel economy it only Produced a sad 122HP.

Models:
Coupe, Hatchback, Mach I

Engine Types:
2.3L 4 Cylinder, 2.8L 6 Cylinder

Transmission:
3 Speed or Automatic

Produced:
385,993 Mustang II's

Of Note:
The Pinto Era of the Mustang.

Models:
Coupe, Convertible, and Sports-Roof Mustang E, Grande, Mach I

Engine Types:
I6/250CID ???HP, V8/302-2v ???HP, V8/351C 2v-4v

Transmission:
3 Speed/4 Speed or Automatic

Produced:
134,867 Mustangs

Of Note:
The last of the best of this era.

Models:
Coupe, Convertible, Grande, Mach I

Engine Types:
I6/250CID ???HP, V8/302-2v ???HP, V8/351C 2v-4v, 351HO

Transmission:
3 Speed/4 Speed or Automatic

Produced:
125,093 Mustangs

Of Note:
All the high-performance Mustangs except the Mach I were dropped due to the need for increased fuel economy.

Models:
Coupe, Convertible, and Sports-Roof Mustang E, Grande, Mach I

Engine Types:
I6/250CID ???HP, V8/302-2v ???HP, V8/351C 2v-4v - Boss 351 330HP, 429 - Ram Air 429 370HP

Transmission:
3 Speed/4 Speed or Automatic

Produced:
149,678 Mustangs

Of Note:
Boss 302 and the Boss 429 were dropped from this years offerings. The Boss 351 4v was introduced as well as the 429 and Ram Air 429's. Mustangs once again underwent major restyling for this model year.