I just did this in my 65, which is narrower than a 70. I used the R & C 4 link in the rear. It was not bad at all in my opinion. I just cut the stuff off that I didn't use and followed the directions. Did the whole thing in a day. I may have to narrow it just a touch, and still have to deal with the drive line. The R & C system is really straight forward, great directions and comes with a video. I have heard that the explorer 8.8 is essentially the same, with rear discs and such, but have not used one yet. Go to my last post in this forum to see pics of mine if you like. Well worth it in my opinion (have not run it yet though...) Good luck.