My "new" '74 Duster- or why I need a project like a hole in the head

Thanks for the reply. The reason I ask is that I had problems finding 8 3/4" for my Barracuda, and put a 9" out of a Versailles in with disks, and 3.55 trac-loc out of a 1/2 ton. The spring perches are 1/2" wider if I remember correctly and I have been considering offsetting the rear shackles, or now using the sliders moved outward as a solution. The car is in the body shop right now so I can't measure it to see what's feasible.