It was the middle of 2009, so I don't remember exact numbers and even if I did, just to tell you stretch it "X" inches here or there is only part of the solution. See the front 4 tub mounts are in the same spot, the next two, by the rear tire are moved from behind the rear main eye to in front of it. The rails on the Scrambler in original form are not CJ-7 parts with just an extension welded on but rather different longer pieces. So that said, the rearmost crossmember is the same on the 7 and 8. On the 7, the gas tank rear edge bolts to it, on the 8 it doesnt as the tank is in close to the axle as in the 7, so there is a second crossmember there (on the 8) that is the same piece, but with the outer parts cut off so it fits inside the frame rails. It is at this point where the next two tub mounts are mounted back a tad as to be different than the CJ7. For the rear rail extensions, I reused the old 8 parts and graphed them in before I welded in the two cross members. I did this to duplicate the way it is originally. I made my own rear crossmember out of a left over section of the tubing. I removed one side to make it a C channel and added the wings for the corner mount holes (not cut out yet in the pics).
If you need an exact number or need an exact picture, TELL ME NOW as I have a bare CJ8 frame and several CJ-7 frames in the back yard now about to go to the sandblaster and then to the galvanizer.
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon