first off can any one tell me what the length of a 8.5 rear end out of a gbody from the back of the backing plate to the back of the other backing plate. will the spring perches have to be moved on the rear as well to line up with the perches on the frame? I'm not worried about the upper and lower control arms for the fact that i am buying the UMI A-body 12/10 to G-body conversion kit. Has any one else done this swap before? post pics if you guys can so i can see what the final product looks like. Any advice would be helpful. thanks guys