70 only on the turn signal switch. The emergency flasher part is a different size. You have ac and non ac ignition switch, ac one has more wires and more prone to melting. Color codes may be a little different than the 70, I believe the actual key with the mechanism is the same on 70/74 but may be a cosmetic look difference I cant remember. Is your ignition switch bad? A member here / friend of everyone here, rebuilds factory switches and wires. Does them perfect. His name is JIM his member name is Slotts. He also does all the switches on your dash panel and has a bunch in stock ,ost of the time.