How would i make this work for me? 83/4

I'm not saying everything they said was right. I didn't even read the whole thing. But the part you referenced was an explanation of the Chrysler platform system. It only said that the models mentioned were A bodies, which they are. It then went on to explain what was a B body, a C body, and an E body. It never said that every one of these cars would have an 8.75" rear axle. I think you just inferred that as you read it.

In a heading in that link called "where to find one".

That link is LOADED with horrible information.