What Lower Ball Joint do I need???

I'm converting my 68 Dart from drums to discs. I am using late model 73-up spindles and UCAs. Do I need the Moog K783 LBJ meant for 73-up A bodies, or do I need the K7023 made for 65-72 A bodies with discs??? For some reason, I thought my LBJs would work. :oops:

I'm guessing I need the K783s???

Thanks a lot guys! I hate stopping through a project because I have the wrong parts!!!