Is there a difference between C10 and C20/C30 Control Arms?

[jrblanke]

Hey guys,
Is there a difference between the C10 control arms and the C20/C30 control arms? How about a difference between the heavy duty front brakes and the regular front brakes?

The reason I ask is because several years ago, I bought some 3" drop spindles to put on my C10 1/2 ton. Like an idiot I didn't heed the warnings about getting the correct ones, and I accidently got the ones for heavy duty front brakes. So I ended up just putting heavy duty calipers, hoses, bearings, rotors etc. I also cut a coil off the springs. When I got it all back together I noticed the camber was way off. The tops of the wheels were leaned way in. At the time I assumed that this was because I cut the springs.

Fast forward like 5+ years, Im getting close to getting it back on the road. But before I jump back into this project, Im just curious whether I should expect to have to replace the A-arms too, or if I should just expect to shim it out.