I put an 87 motor into a 92 frame. The bottom mount and front mount lined right up and were the correct width. The one with the swingarm was even in the right spot. I had to fab up some spacers for the shock linkage, but I was using the 87 swingarm on the newer frame/shock. The cylinder head stay had to be fab as well. I could get it to bolt to the head and hit one of the two holes on the frame, but not both.