No it's definitely only true for the KH disk lower ball joints, the 73+ disk spindles use a different bolt spacing. But I think the 73+ drums spindles do too.
I think the only ones you can just drill are the 67-72 10" drum lower ball joints and that only works for the KH disks. But like I said, Jim would know better than me as I don't deal much with the SBP stuff.