Upper Control Arms in Disc Conversion

Treblig said

Dozer, If you read the links I posted earlier you'll find that there are two A body UCAs. One has a LBJ one has a SBJ. You can put disc brakes on a SBJ upper control arm but then you have to get other parts to get them to work. Plus the large ball joint UCAs give you larger brake rotor options anyway so it makes no sense to go with the SBJ UCAs..at least it didn't make sense to me. Either way I sold my SBJ UCAs in about 3 seconds here on FABO so it's worth it. You can also sell your whole drum front brake system when you're done getting some of your money back.

Treblig

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True, but UCAs between disc and drum setups are the same, if you're talking the same ball joint size, right?

In other words, UCAs with LBJs work on disc OR drum LBJ spindles. UCAs with SBJs work the same way, on disc or drum SBJ spindles.

Duster_71 was asking if the UCAs were the same between the disc and drum LBJ setup, even though they had different part #s. I believe they are the same, even though you stated in an earlier post that you used 73-76 A body disc brake UCAs on your swap.

Not trying to make anything more confusing, but I guess this all boils down to whether or not there are different LBJ UCAs for disc and drum systems. I know the disc and drum spindles are different but I believe the UCAs are the same.