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What defines a SCJ?
#1
I can't find any specific information as to what defines a 1971 SCJ Mustang in either Marti's "Mustang by the Numbers" or my Mustang Recognition Guide.

I see a Marti Report that there is a SCJ Ram Air 429, and I presume an SCJ requires a 3.91 or 4.11 rear end. Are the SCJ's only J codes and not C codes? Or are they a subset of each? What other features are unique to the SCJ's?

Your humble SCJ idiot...

Let me check your shorts!
http://midlifeharness.com

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#2
I believe the engine itself will have a solid lifter cam as opposed to a hydraulic on the CJ and PI engines.
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#3
midlife;288399 Wrote:I can't find any specific information as to what defines a 1971 SCJ Mustang in either Marti's "Mustang by the Numbers" or my Mustang Recognition Guide.

I see a Marti Report that there is a SCJ Ram Air 429, and I presume an SCJ requires a 3.91 or 4.11 rear end. Are the SCJ's only J codes and not C codes? Or are they a subset of each? What other features are unique to the SCJ's?

Your humble SCJ idiot...

The easiest way is just to look for the V or Y axle code. There are other differences such as a holley instead of a rochester carb, different engine internals and also a thermactor system.

The drag pack could be installed on either the C or J code engines but is much more common on the J code (10 to 1 if I'm not mistaken).

I actually think that the 71 SCJ car is probably the quickest 65-73 Mustang built but unfortunately it doesn't appear that there was ever a road test done of one.

Here's an example of a Marti report for an SCJ car:

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Mark
71 Mach 1 J code - Japanese export
72 Convertible f code - first car
Numerous other Fords
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#4
Wouldn't or shouldn't the engine code be different for a SCJ (solid lifters) vice the C or J code 429 engines?

Are there any external markings to differentiate the SCJ from the CJ?

Let me check your shorts!
http://midlifeharness.com

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#5
Here is the info from the 429 megasite, go to bottom of page. http://429mustangcougarinfo.50megs.com/decoding.htm

run_horse Run Horse Run!
John 72 Q Code
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#6
midlife;288413 Wrote:Wouldn't or shouldn't the engine code be different for a SCJ (solid lifters) vice the C or J code 429 engines?

Are there any external markings to differentiate the SCJ from the CJ?

Do you mean on the car or engine?

There is no external difference to the car to designate that a car is equipped with a drag pack.

My go to positive ID is the axle code on the door tag.

If the car is original the easiest underhood change is the inclusion of the thermactor emissions system. If that's not there I'd look at the intake/carb. There are lots of small differences as well but if you were taking a quick visual look those would be the big ones to look at. One big item which is NOT on a 71 drag pack car is an external oil cooler which was included on both the 69/70 drag pack cars as well as the Torino drag pack cars.

Mark
71 Mach 1 J code - Japanese export
72 Convertible f code - first car
Numerous other Fords
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#7
Since the engine parts are different, I would have thought that there would be a separate code for the SCJ engine for the VIN.

Let me check your shorts!
http://midlifeharness.com

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#8
midlife;288425 Wrote:Since the engine parts are different, I would have thought that there would be a separate code for the SCJ engine for the VIN.

Ford did not pay special exterior significance to the SCJ, in terms of additional paint or labelling markings. Much confusion out there with the "C" and "J" code designations as many people believe that simply having the "J" code designation (which added the ram air set up), was in fact; the scj upgrade because of the advertised 5 HP gain (375 vs 370 for the non-ram air) with its installation. Not so, you could get either the "cj" or "scj" engine upgrade with the "j" code designation.

I had to chuckle when my CJ vert was featured in the Barn Find section of the MM September, 2015 edition. The front cover refers to it as a '71 SCJ....
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#9
Pastel Blue;288429 Wrote:I had to chuckle when my CJ vert was featured in the Barn Find section of the MM September, 2015 edition. The front cover refers to it as a '71 SCJ....

Anything to sell a magazine......... Tongue

Mark
71 Mach 1 J code - Japanese export
72 Convertible f code - first car
Numerous other Fords
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#10
Midlife, that would be too easy after dealing with an "H" engine code for years that could of meant a 2bl version of the 351W, 351C, or 351M. We got used to the "Deer in the Headlights" look when asking "Which one do you have"? Ford designed and built a lot of great vehicles and some very nasty performance cars. Identifying the cars and the parts that made them what they were could be difficult at times. All above posts have very good info. If looking at a complete and running car, then checking for the internals that made a 429CJ a SCJ would out of the question. Checking the differential code as mwilson7 suggested as the "V" (3:91) "Y" (4:11) or "W" (4:30-Torino/Cyclone) was restricted to the Drag Pack cars. There was also an adapter that was used between the speedometer cable and the transmission that was used to "correct" the speedometer reading because of the extreme RPM's of the Drag Pack gears. There were different versions used for C6 and 4sp applications. This particular part is very difficult to find and very expensive. (Bad for the people who "Feel" their car is a SCJ)! The SCJ cars also used a unique fuel pump that was shared only with the 69/70 Boss 429. (That also means $$$). As others have posted there were carburetion/intake differences plus the use of the Thermactor emissions system on the SCJ. Some have tried to claim the engine oil cooler came on the 71 Mustang, but it was only on the 69/70 428SCJ Mustang and the 70/71 429 SCJ Torino/Cyclone. If your fortunate enough to find a 429 that still has the metal or paper tag you can check the engine code which was normally a three digit number sometimes followed by a letter.
Hope this has helped some and not made things worse! ahh...and yes, a separate engine code would have been nice! whistling

Steve

No Officer...I really don't know how fast I was going, my speedometer stopped at 140!
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