A buddy of my dad's says he has a Ford F150 that has a twin plug four cylinder motor in it. I don't think ford built such a thing. After some time using Google I could not find anything on a four cylinder F150. Now I found that Ford put a twin plug four cylinder in the ranger and mustang in the early 90's. Could it be some oddball industrial motor? I think Mercruiser built a four cylinder that used a 460 big block head. I think the guy a has a Ranger on his hands. Any ideas?