Man that looks good!
(ok.. I am biased!)
The 9" rear will not have an issue due to the fixed axles (bearing on axle). We are running into an issue right now on a g-body rear (assume it is yours TurboBuRick?) where the rotor is coming in contact with the caliper body.
We are looking into this now (getting some pics), and not sure why it is happening yet. Keep in mind we do almost every 10/12 bolt c-clip rear axle and this is the 3rd issue where this has come up (out of all the ones on the road). It might be due to excessive axle movement.. not sure. We have a stock 8.5" 10 bolt at work now we will mock up and check.
We have this on a number of g-bodys with no issue (including Scot W's car).
We will figure it out what is causing it.