[David Pozzi]

The recomendations are good.
All I would add is you need to run about 5 degrees of positive caster and can probably only achieve 3 deg positive with stock upper arms even with the Guldstrand mod.

Consider either making your own upper arms with more caster built in, or relocate your upper A arm brackets about 7/8" to the rear and use your stock arms.

Other things I like are
AFCO delrin A arm bushings I don't know if these have the side "washers" that a Global West bushing kit would have. You might be able to make some.
Stock car stock appearing coils, 5" OD X 9.5" tall. Use a threaded adjuster on top, cut it to fit your upper spring pocket taper.

I don't have a big block spring bar setup but the tuners like Guldstrand or Hotchkis would probably use a 650 front coil rate and a 175lb/in rear leaf rate. Stock is 325/110.

You can drop the front rate for a better ride but 550 is probably minimum unless you just cruse it. A lot depends on horsepower, tire size, and how agressive you want to drive it. Also, the lower you go with the ride height, the stiffer your springs have to be.

A small block Camaro is going to need a 1" solid bar up front and depending on rear spring rate, some kind of rear bar.
David