I can't remember if the 70 b & e body k-frames interchange. I know that the part numbers are different but that doesn't always mean they are different or interchange. Picked one up, 70 e-body, at the Fall Fling to have on reserve for down the road repairs. I know 71- is different because of the steering box mount angle. Would like one on hand to replace my 70 b-body when needed. Thoughts anyone?