Lowered trailing arm trucks...and shims

[Rich69shortfleet]

The truck was bone stock when I got it. I've lowered it. All I did to the control arms was to add poly bushings and I put in some lowering springs and a rear sway bar. There are no shims in it. I did replace the u-bolts when I installed a set of G60 rear helper springs and had to get the half-leaf touch plates into the axle/control arms/spring plates/shock mounts sandwich but nothing in that mix changed the control arm to axle angle.

However, now that I think about it, the rear axle is not original to the truck. I got it from Manes years ago as it is an original truck 12-bolt posi. It was easier to just swap rear ends than swap the guts into my existing housing. Maybe this axle had a different angle built into it's control arm mounts for whatever reason. Do coil spring and leaf spring axles interchange? If so, do leaf spring rears have a different mount angle than coil spring rears?