73 Camaro, wheel question

Hey all,
 
I just picked up a 73 Camaro and I'm torn on what wheel set up to go with?  I am set on getting the American Racing Torq Thrust wheels and I'm curious on what backspace I should use and if I should put 18s on the rear?  Also, what width of rims front and rear.
 
Just wondering what you all have and if you could attach a photo so I could see your set up, I would greatly appreciate it. 
 
Thanks,
Dino

I'm not sure on the backspace for 18's but I think 3 3/4 would work.  would go 7's front and 8 1/2 rear.