They all seem to be ebody in length or width. The two I am dealing with are both E Body. One has many 1970 parts in it and was a July built piece but this rear end might not and like is not the original to the Cuda. Are other one that will be used in this Cuda that is being built has a lot of weld on the tube but when it is pulled apart will look at the dates of the unit but the gears are 513 so you can not say for sure if the inners are original to the rear end.