Thanks guys for the info! The biggest problem I have is that the link bolts themselves are rusted beyond reuse. I have a set of usable endlinks from what I believe to be a rear bar from a 75-79 B-Body. However, they are 1/2" longer than the ones for my RR. The only thing I can see it doing is raising the bar up an extra 1/2".
Will this extra length negatively affect my handling or will it not cause a problem?

The bracket that attaches the bolt to the bar will be an easy enough fix. I am going to drill out the spotwelds to remove the bracket from the bar. Then I will install split bushings on the bar and bolt the brackets back together over the bushings.