Did you subframe yours? I would imagine that in stock trim they rode like a rock wagon. Cool truck.
So yes and no--new suspension yes, but I didn't use a subframe from another vehicle. We did a custom 4-link rear with panhard bar and a weld-in Heidts IFS up front with 2" drop spindles. It also got a blueprinted stroked 350ci, new 4-speed trans, and Ford 9" rear end. It was a really fun truck to own and drive.
Lol, it certainly did. I got it from an apple orchard in CA so it had overload leaf springs too--it was in amazing condition but literally bounced going down a paved road when it was stock.