data call: Q code cars

Please help us determine the changeover date for the non ram air breathers' different decals.

I think-

Sometime in early 1972 production, the chrome breather covers received a change of its decal. "351-CJ" was used first, then it was changed to "351-4V".

Please post your build date and which decal your car has.

I also understand the arc of the repro decal for 351-4V does not fit perfectly. Both of the originals fit the correct chrome cleaner cover/top correctly.

Any assistance will be appreciated.

Ray

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Hi all my Q code was built 12/10/71 but unfortunately has an aftermarket cleaner at present. I have the correct OE part waiting to be fitted at that has a 351 CJ decal...... hopefully it is correct and appreciate being added to the database so I can maybe find out!

I just Googled my chassis number and found the following on the decodethis.com website.....according to this only 154 CJs were built in 1971 - sounds low to me:

"Year: 1972

The Mustang grew larger and heavier with each passing year culminating with the 1971-73 models, designed under the supervision of Ford's new product design manager, Semon "Bunkie" Knudsen, originally of General Motors. Knudsen's turn at the helm would see the last high-performance big-block Mustang, 1971's 375 hp 429 Super Cobra Jet.

Unfortunately, that very same body style was designed for the sole purpose of big-block installation versions, and was limited to a maximum of 351 CID (5.8 L) in 1972 and 1973, due to extremely strict U.S. emission control regulations and low demand for big block musclecars due to high insurance premiums. Two more high-performance engines were introduced in 1972, the 351 "HO" and 351 Cobra Jet. Both cars were excellent performers, but at nowhere near the level of the Boss cars and original Cobra Jet.

Car companies switched from "gross" to "net" power and torque ratings in 1972, and this coincided with the manufacturers making low-compression motors with different, far more restrictive induction systems, making it difficult to compare power and torque ratings. Very much a different car than in 1964, Ford was deluged with mail from fans of the original car who demanded that the Mustang be returned to the way it had been.

Engine: V8 351 CID 4V

this motor was introduced late in 1971 with very few 1971 Q codes made (154) and followed thru 1972 and 1973 and continued in the cougar torino lines in 1974 the last year for the 351 cobrajet!"

Click to expand...

Hi all my Q code was built 12/10/71 but unfortunately has an aftermarket cleaner at present. I have the correct OE part waiting to be fitted at that has a 351 CJ decal...... hopefully it is correct and appreciate being added to the database so I can maybe find out!

I just Googled my chassis number and found the following on the decodethis.com website.....according to this only 154 CJs were built in 1971 - sounds low to me:

"Year: 1972

The Mustang grew larger and heavier with each passing year culminating with the 1971-73 models, designed under the supervision of Ford's new product design manager, Semon "Bunkie" Knudsen, originally of General Motors. Knudsen's turn at the helm would see the last high-performance big-block Mustang, 1971's 375 hp 429 Super Cobra Jet.

Unfortunately, that very same body style was designed for the sole purpose of big-block installation versions, and was limited to a maximum of 351 CID (5.8 L) in 1972 and 1973, due to extremely strict U.S. emission control regulations and low demand for big block musclecars due to high insurance premiums. Two more high-performance engines were introduced in 1972, the 351 "HO" and 351 Cobra Jet. Both cars were excellent performers, but at nowhere near the level of the Boss cars and original Cobra Jet.

Car companies switched from "gross" to "net" power and torque ratings in 1972, and this coincided with the manufacturers making low-compression motors with different, far more restrictive induction systems, making it difficult to compare power and torque ratings. Very much a different car than in 1964, Ford was deluged with mail from fans of the original car who demanded that the Mustang be returned to the way it had been.

Engine: V8 351 CID 4V

this motor was introduced late in 1971 with very few 1971 Q codes made (154) and followed thru 1972 and 1973 and continued in the cougar torino lines in 1974 the last year for the 351 cobrajet!"

Click to expand...