I received a question about the alignment specs I was able to achieve with these thinner spacers. I haven't adjusted the alignment yet because I'm waiting until after I've replaced my steering gearbox. I do, however, have my alignment specs from before replacing the spacers. I had no shims on the front driver side stud, and I had one 1/16" shim on the other three studs to achieve the alignment shown below.
Now that I've got the thinner spacers installed, I've got an additional 3/16" worth of shims on every stud to work with. I'm hoping to achieve 6-8° caster and 0.5-1° negative camber on the next go-around, based on recommendations from this thread:
http://67-72chevytrucks.com/vboard/s...d.php?t=419251
By the way, I've got 2-1/2" Western Chassis drop spindles and 1" drop springs. My control arms are stock.