UCA question

[spudsterier]

what exactly is the difference between the UCA on a front drum car and a front disc car?
anyone got a pic of both side by side?
thanks

 

[RedFish]

The difference is the diameter of the threaded hole where the upper ball joint screws in it. 73 up disc brakes use the larger upper ball joint.

 

[65 Dartman]

For the 66-72 Kelsy Hayes disc brake cars, there is no difference in UCA's

 

[AndyF]

I don't know of any difference for 1973 or newer A body cars. The both use the large ball joint.