I'll do you one worse... it really doesn't fit this category because it came out in 1972, but who could forget the unbelievably bad, "The Thing with Two Heads" (starring Ray Milland and Rosie Grier).
Milland played a really rich bigot who needed a transplant and ended up getting his head attached to Rosie Grier's body (while Grier was still in it).
Ha ha ha ha!! Yes, I remember SC. That was embarrassing, especially for an actor of Milland's stature. What the hell were they thinking? When I was much younger they use to show that movie more, but haven't seen it listed in the tv guide in years and years.
TIS
"Mankind must put an end to war before war puts an end to mankind. War will exist until that distant day when the conscientious objector enjoys the same reputation and prestige that the warrior does today." JFK