My new wheels are due to be delivered today 09-10-12. I have a little hope after seeing that Carl Casanova's 68 Camaro is running 17x9.5 with 5.5 backspacing all around and 275R40R17's. I plan on going much smaller.
http://www.geocities.com/casanoc/
I also was looking at the Kore3 brake kits and it looks like it would move my wheel out 0.20".