I have a spare 1986 Force 125 (1254x6a) (1775), and I want to know how hard it would be (or is it even possible) to put that whole ignition setup on my 1978 Chrysler 105 (1057H8H) (2555)? The engine blocks look exactly the same, the lower units look the same, heck the fiberglass lids even transfer engine to engine. What all would I need to switch over?