Okay so it has been a while since I have posted anything here and I figured since I am looking to switch to a motorcraft carb on my CJ that I would post some info that should be helpful to others looking for motorcraft carbs
List of Motorcraft 2100 Carburetors
*Note: Although this list covers the majority of carburetors that will work with a Jeep 4.2L it does not cover all the possible variants that will work. This list will include carburetor ID tag numbers for the 1.08 (287cfm) which is known to work very well on the 4.2L, and the 1.14 (300cfm) which should also work.
289 c.i., 1.08 Venturi
C8AF-L, AF, AK,BD; C8DF-E, F; C8OF-S; C8ZF-E, G, H
302 c.i., 1.08 Venturi
D2AF-HC; D2FG-AA, AB, AC, BA, BB, BC; D2OF-JA, KA, KB; D2ZF-FB, MA; C9AF-B; C9ZF-G; D0AF-C, U;D1AF-DA, ZA; 1OF-ABA, ADA, AGA; C9UF-B
289 c.i., 1.14 Venturi
C2AF-AF; C3AF-E, F; C4AF-B, BG, DD; 5AF-B; C5ZF-A, B, G, H; C6AF-B; C6DF-A, B, E, F
352 c.i., 1.14 Venturi
C5FT-B, Y; C6TF-C
I hope this helps others when the are looking for carbs to buy.