Wheel sizes and backspacing

[USAZR1]

Hey thanks for the info Clint. I definitely want to run the biggest combo possible, are the 18x8 and the 18x9.5 going to give me any rubbing issues? Am I going to have to roll the lip in the rear? Any help would be great. If what your saying is true then this is what I am going to go with.

Check out this Wheel & Tire database at Teasm Chevelle. Go to page three and scroll down to David Bates' 65 El Camino. Lots of good info.
http://www.chevelles.com/forums/showthread.php?t=33229