1966 chevelle question

[wyattroa]

Alright I am trying to get in contact with the owner of the car posted down below. I plan to do the same thing with my wheels and run the weld rts line of wheels. I have found out the wheels are 18x10 in the rear and 18.95 in the front. What I am trying to figure out is the backspace they are running on these wheels. I will be running the same suspension setup as they are. Does anyone have any information on these?

http://www.superchevy.com/features/1...rage-drop-top/

Robert