It’s all about axle tube size, shock mount location and leaf spring width. If a rear end meet these three requirements, the ywill work. I don’t see what the big debate is about?
Im not sure, I need a matching passenger side plate or a set, my rear is an 8 1/4 confirmed (by the numbers) with 3" axle tubes. rather buy from a member here than ebay but it's starting to look slim