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All gen I's tb's had the same torsion bar part numbers ('til 91).


According to the part numbers you listed, they're the same in '91 as the earlier trucks.

For our purpose, I don't think there would be enough spring rate difference to worry about in the front on any Gen1 - SWB or LWB. Even if the later LWB models have a slightly stiffer bar than the SWB, it shouldn't matter and if anything, might be a better choice for any '89 SWB - particularly if it has larger tires and/or a heavier bumper or winch.

The mounting receivers for the bar ends might be different and the length may be different, but maybe it's possible to overcome that - if needed.

Justice might be correct that the differentiation in length could be the coil vs. leaf spring rear setup - or it could be that the '92 year was the changeover. I'm interested in what he finds on the '89/'91 comparison. Then. the question might be how to modify the rear bar mounts and perhaps the front bar receivers to use the Gen2 bars in a Gen1.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum