If you use the '88 Suburban rear, it will be 1.5" wider drum-to-drum versus your stock '62 rear. To eliminate a bunch of bracket swapping, you can convert over to a different track bar mount style (a great kit is the Super Track Bar kit from Early Classic). You will have to buy a pair of perches, but those are cheap. The problem with some of the older rears is the lack of replacement parts, especially the 3/4 ton and up rears.
I went with the rear from my '79 Suburban donor, but in order to fit my rear wheel/tire combo, I'm narrowing it a total of 4". So much for staying cheap......
