Classic Cougar Drive Trains: 1971

Cleveland 351 4V

1971 Engines:

The Cleveland 351 2V remained the Cougar's standard engine for 1971, but it lost 10 horsepower and a little torque in the model year changeover.

When the 1971 models were introduced there were three optional engine choices: a slightly de-tuned 351 4V, the new CJ 429 4V and the CJ 429 with Ram Air. On 5/17/71 a "CJ" version of the 351 (280 h.p.) was added.

 

CID Carb CR HP Torque Exhaust Std/Opt VIN Code Specs
4291 4 bbl 11.3:1 370@5400 450@3400 dual optional C VIN Decoder 1971 2
351 2 bbl 9:1 240@4600 350@2600 single standard H VIN Decoder 1971 3
4292 4 bbl 11.3:1 n/a n/a dual optional J n/a
351 4 bbl 10.7:1 285@5400 370@3400 dual optional M VIN Decoder 1971 5
3513 4 bbl 9:1 280@5800 350@3800 dual optional Q VIN Decoder 1971 5

NOTES:
(1) CJ 429
((2) CJ 429 w/Ram Air
(3) CJ 351 -- introduced 5/17/71


1971 Transmissions:

Type Ranges Eqpmnt Code
Manual1 3-speed 1
Manual2 4-speed 5
Automatic (C-6)--Select Shift3 4-speed U
Automatic FMX5 3-speed X

NOTES:
(1) Standard with 351 engines
(2) Optional with all engines
(3) Optional with 351 4V & 429
(4) Optional with 351 2V


1971 Rear Axle Ratios:

Eqpmnt Code Non-Locking Locking
2 2.75 -
3 2.79 -
4 2.80 -
6 3.00 -
9 3.25 -
A 3.50 -
K - 2.75
M - 2.80
Q - 3.00
R - 3.25
S - 3.50