Well, I've got the Haynes manual, and here is the diagram it shows for spark plug wires (mine is the 2.5L 4 cylinder according to the sticker on the fan housing - could that sticker be wrong?):
What it doesn't explicitly state is which orientation the distributor is being viewed from. I was under the mistaken impression that all the distributor wires were different lengths, so I didn't take notice when I removed them. The distributor cap only fits on one way. Presumably, the two longest wires are to reach the two farthest park plugs, 1 and 2. The old distributor cap had the two longest wires on the terminals closest to the cab (left side). BUT, if I hook up the wires as the diagram suggests, the two longest wires would be on the TOP, or the RIGHT, depending on how the diagram is to be viewed. So I'm totally stumped.
Is it safe to say that I KNOW the two longest wires must go on the left two terminals (because of the old distributor), and the short two wires on the right two terminals, thus, the left two terminals must be 1 and 2, and the right two terminals must be 3 and 4. That would leave me with only two possible wire configurations, one clockwise and the other counter clockwise. According to the diagram, it's clockwise, but I've already proven the diagram wrong (...or the engine size sticker is wrong?).
Is there another, more certain way other than a sticker to determine the engine size?
In the mean time, I'm going to replace the starter so I don't have to roll the truck down a hill to see if it will start.