Opinions on a Suspension Upgrade to my 68 BB Camaro

[StevieBB54]

Hello all, I think this is my first technical posting. I am looking for opinions of which may be the right road to go down to upgrade the suspension on my driver 68. I bought a set of street QA1 CA's with coil overs for the front (still in boxes) so if I had to change. In the near future I am going to go 9" rear on probably a ridetech 4 link rear suspension and thinking QA1 coil overs to keep everything the same.

My question is with the QR steering box and the stet control arms be enough with adjustable coil overs to tighten up the steering control? The PS gets sketchy at higher speeds which I understand is common with stock control arms.
I do want to maintain a 2" front drop and 3" rear (car came with rear blocks and 2" springs in front). QA1 makes a pro touring upper CA with a 1" longer ball joint, but Im not sure if that will mess up the geometry to where I bump steer issues or if that puts the tie rod ends too close to tire (running 15x7 with 225/60-15 with disc brakes.

I like the old school look, but the thought crossed my mind if I go this route I may have to go to 17 or 18" wheels. Having said all this
Is the set up I mention decent to go with, or will be opening a big can of worms? Thanks. Apologize if this sounds like a dumb question.