Differences between 2WD and 4WD clutch linkage?

[RedRoad]

Is there a difference between the two? I have not been able to find a listing specific for either with exception of the engine side ball

Ive found two repro bell cranks, one for V8 and a shorter one for V6. Here is the V8 one

http://www.usa1industries.com/1967-7...-assembly.html

anyone know what the difference is on the engine side stud between 2wd and 4wd? Is there a bracket or something for the 4WD unit?

http://www.usa1industries.com/1963-8...stud-ball.html

Is there also a difference between years? 67-68, 69-72?

Here is a pic of Chris' 68 burb, anyone got a pic of 69-72?

Thanks