Relying on the springs you have might also be a problem. You need to get as much insurance as you can, rolling the inner lip on the guards is a must. Going with the stock offset for the front is an option but might not give the look you're after (modern Commodores seem to get pretty close though). 10s shouldn't be a problem but your choice of tyre might be (although I see you've gone for the lower profile tyre). Does it need to be 275? Don't be afraid to run a 265 or 255 (I've run as low as a 225/45/17 on a 9.5 wide wheel, would probably got to a 215 if I was in a squeeze and that was all that was available), this was on a car that I tracked too.
Are you after fitment? Either way, you should be looking for builds high and low and not just rely on this single thread. Do you have wheels in mind?