well, i ran 10 ply truck tires on my little M170 and also on a Geo Tracker for a number of years. i just kept them aired to about 25psi and with the stiff sidewalls, they did fine in the ride department. i don't think truck shocks would be any different really. just make sure not only the length (both collapsed and extended) is correct, but also the mounting has the correct diameter bolt holes. i sure wouldn't hesitate to use them if it saved me that much money.
1966 CJ5A, mods are coming
1966 Wagoneer, bone stock