1968 10" drum brake hardware kits?

I recently got a spring kit from Autozone H7129 for my rear 10" x 2.5" on '75 Duster. It came with 2 different length pins. The ones I did not need were 1/4 inch shorter. Don't know if the other parts are diff for older ones, just sayin, they are making these kits to cover multiple apps.

One thing that did not match was the upper springs. Mine had all long springs when I got it. They gave me shorter ones for the primary. Can anyone tell me if it matters? The back one must be long to hold the wire guide for the adjuster, but I saw others online with short spring in top hole and seemed to work fine...