I found the build sheet under the back seat of my 70 malibu. It said it has a F41 trailoring package on it, What does this package consist of? I have a 12 bolt 3.31 posi. I would like to know if i have special springs b/c i would like to lower it in all 4 corners.

I have stock power dick brakes/drums.
I have no rear sway bar!!!! what is special about this "trailoring package"? if it has difference spring i might not mess with it

F41 was a suspension package that included a bigger front sway bar, frame stabilizer bars, and 12 bolt rear, boxed rear control arms, and I'm probably missing a few.