18″ x 10

Anyone running 18" x 10 rear with 275/40/18 & 18" x 8 Front with 265 /40/18
do you know the backspace i am looking at the Forgline ZX3 like on the Hotchkis Challenger
Hard trying to get a good answer tried the Forgeline page but they dont respond
Thinking 4.5 backspace on front & 6" backspace on rear using Baer 14" rotor with 6 pot front
4 pot rear.
Standard K Frame
Author: AUSTA