The starter on a 2F is a piece of cake. I did crawl under the truck but that was only because it was easier to reach the bolts from below rather than from above due to the distance of the starter from the top of the fender (where my armpits were). I had the same "turn the key but it won't start problem" I would get the click from the solenoid firing but the contacts were too worn to make contact with the contact ring and both contacts at the same time, thus preventing the juice from making it to the starter motor. Ron, like Steve asked, are you hearing a click when you turn the key? Can the contacts be replaced on a 100-series starter as easily as they are in a 60 or 80-series?