Jim,
Not to break your chops or anything, but couldn't you go into napa and ask for a throttle cable for a 90 Mustang GT and have the punk behind the counter look it up for you? Just to add a little substance to this, I think the Ranger cable is the same but longer than the Mustang cable. Maybe that would be the hot ticket. (I have a Lokar in my future.) I hope all is well.
James