Todd, the only difference is most of the S-10's have the larger M14 bolt than the G-body. The stock lower A-arms are the same stampings. Most of the S-10 lower A-arms out there are for dropping the truck further. You may be able to simply mail the units back in a padded envelope for about $1

I cover the different donors in the instructions with directions on drilling out the cross member holes for S-10 donors (easier to drill a smaller hole larger than the other way around).

Scott

The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me