Conspiracy hobbyists have been waiting for that straw for 62 years and are still grasping.
I have no idea why Gerald Ford wanted that change. It made no sense. The geometry of the wounds caused by the single bullet worked perfectly fine with an entry wound on the upper back. IOW, it was an act of stupidity.
Some of us were around when Gerry Ford was a lowly Congressman. He was not a trail blazer back then or a late bloomer down the road. He was not a leader and would not have moved the WR written location of that wound on his own. Just not in him. LBJ put the WC together, and he did this after teaming up with J Edgar Hoover only days after the assassination. Ford was nothing more than a political foot soldier.