I would think that most f150 seats would be too wide for the ranger but never know. As far as explorer seats this is what will fit. With no modifications to very little modification.
02+ Explorer Sport
02+ Sport Tracs
02+ 4doors will not work since they are too wide and use a different style rails
I have 02+ Sports in my 04 extended cab and they fit great. Only had to make the mounting holes bigger on the seat rails!