There are 2 different inside diameters(in the metal sleeve) for the control arms. Does anyone know if they are interchangeable? Is the control arm itself the same, but just the inside sleeve is different?

are you looking on the super-pro website? the larger diameter bushings they offer are for the ea81 stuff

Well, allow me to explain my dilemma then.

 

1987 brat. EA82 front cross member swap. Just did a 5 lug swap from an XT6. The bolt diameter in the XT6 is larger than the diameter in my EA82. So the new control arms have larger holes in the bushings for the bolt.

 

Which means EA82 has 2 different bolt sizes.

Well....XT6 has a different bolt size. I had to drill out the crossmember both times I did it.

Yes, but does it have a different outside diameter bushing?

Yes. It's physically larger then the EA82 bushing.