78-98 at least as these are the years I have physically used or compared in the PnP

To use the pocketed truck LCA you need the steering arms that go with them & drill your spindles out to 3/4" so the arms will bolt tight
As with both the Van or the Truck you will have to drill the mounting tabs on the frame to 3/4" (a Harbor Freight step bit is the best way & cheapest for this)

The van arms require the steering stop removed
Strut rod holes drilled
Area around bushing ground down till they fit the tabs