My tour included some of the 4x4 converters not all
Here are some markers I retained:
Quadvan : Coil / leaf, ford pieces, no welding involved
Quigley: Coil / leaf, ford + home made pieces, welding involved
Salem Kroger : Coil / leaf, ford pieces welding involved
Sportsmobile : Leaf / leaf, aftermarket pieces, welding involved
I would back saabman's option of coils all around for confort.
Should mention I have 2 landcruisers with coils all around