My Ranger must be different than the ones described... Mines a 93, but it doesn't have any type of crank mechanism. It just has a pivot in the back, with an arm the tire sits on, and a bolt holding it up, in the back. Undo the bolt and the arm/ tire swing to the ground. Is that just the style that older trucks have?
Also the above mentioned fuel shut off, is just that. It is located on the passenger's side on the floor, up under the dash, kinda. Mine was RIGHT where the carpet stops, but about half under the carpet. It's maybe an inch or two, by an inch or two, with a little button on the top (pushed in for normal apperation, and it pops up when it has been tripped).
It is supposed to only trip when you are in an accident, but if you have a passenger with very active feet, they may trip it as well. Or coming down hard on a rock while wheeling might trip it as well.