slow_ws6

Hey guys i really dont understand wheel offsets. lol i have read alot about it and still cant get it lol. but i need some help, my ta is lowered on sportlines and otherwise stock suspension. I want to put c6 zo6 wheels, and will a 19x10 rear with a 56mm offset fit without and mods such as a spacer??? I already have a big bfh mod!!! and the tires i will be running are 295/35/19 bfg kdw nt's. I also found a set with a 65mm offset which would be a better fit??