Drove the Monaro around a bit tonight... good car! This probably won't be a long review because it's fairly balanced all around, but here goes...
For such a large powerful car the handling is great - I'm sure the race rubber helps here. I didn't try it on Sports-compound, but I can imagine about half the power would evaporate in tire smoke. Turn in is quick, and from the apex on, with the right amount of throttle it's dead on. I might suggest pumping the initial torque up a bit to make the diff a bit more eager - it might be fun to be able to put a little more power down on exit with less fear of snap, but it's fine as is. Alternatively, I might suggest taking a look at your camber and toe - they seem a little bit excessive all around, and from playing around on the Nurburgring I think they might be interfering with high-speed braking. Aside from that I can't suggest much else. Gearing is appropriately long, the aero balance through sweepers is good, and the suspension seems to behave well even with the curb-igniting ground clearance. Nice job! Now let's see one tuned specifically for sports tires :-)