Essentially a Super Cobra Jet is a CJ car ordered with the Drag Pack option.  This option is identified on the door data sticker as an axle code of V or W.  What that gave you was an rear gear ratio of 3.91:1 (V) or 4.30:1 (W).  When this option was ordered ($155 for the 3.91 or $207 for the 4.30) it upgraded the following

Original - CJ Drag Pack - SCJ
2 Bolt mains 4 Bolt Mains
Cast Pistons Forged Pistons
700cfm Rochester carb 780cfm Holley carb
No Oil Cooler Oil Cooler
2 Fuel Lines running to gas tank 1 Fuel line
Hydraulic CAM Solid CAM
Breather hose to air cleaner - left hand side Breather hose to air cleaner - front of air cleaner
Air Cleaner snorkel comes out straight Air Cleaner snorkel bends slightly to the right
Air Conditioning available Air Conditioning NOT available
CJ has a 5/16 fuel line SCJ has a 3/8 fuel line

 
Block CJ or SCJ C9AE-A, D0VE-A, D1VE-A
Head CJ or SCJ D0OE-R
Rod CJ or SCJ D0OE
Exhaust manifold D0OE-9431-A (left), D0OE-9430-A (right)
Intake Manifold SCJ D0OE-9425-C
Intake Manifold CJ D0OE-9425-D or A
Air Cleaner dimensions 429CJ w/o ram-air: 17.84"d - 4.20"h
429CJ, ram-air: 18.83"d - 5.56"h
429SCJ w/o ram-air: 16.79"d - 3.66"h (same as 428cj)
429SCJ with ram-air: 18.83"d - 5.34"h

Cobra Jet engine -Notice the breather hose to the side of the air cleaner and the snorkel assembly Super Cobra Jet engine -Notice the breather hose to the front of the air cleaner and the snorkel assembly

 

 

Air Cleaner Dimensions - Looking for the correct air cleaner? 
69torino
428cj with & w/o ram-air: 16.79"d - 3.66"h (just for reference)
70 Torino
302 & 429 w/o ram-air: 17.84"d - 4.20"h
351 w/o ram-air: 17.00"d - 4.20"h
351 with ram-air: 17.00"d - 7.00"h
429CJ w/o ram-air: 17.84"d - 4.20"h
429CJ, ram-air: 18.83"d - 5.56"h
429SCJ w/o ram-air: 16.79"d - 3.66"h (same as 428cj)
429SCJ with ram-air: 18.83"d - 5.34"h

71 Torino
351 w/o ram-air: 17.84"d - 4.20"h
351 with ram-air: 19.50"d - 6.96"h
429CJ w/o ram-air: 17.76"d - 4.10"h
429CJ with ram-air: 18.83"d - 5.34"h
 

Some pictures of CJ and SCJ engine compartments I got from Jerome (Truckerbear). 
I cannot guarantee they are perfect, but they are mighty close! (in random order).

Extremely high resolution - 200 - 500KB each!

CJ

     

 

 

SCJ