Ok I can speak to this very easily,
1 there is a small ball on the end of the clutch rod inside the MC that holds it in place.
2 there are/is a metal thinkgamajig inside the MC with little fingers that retain the rod in place once the ball end is pressed in enough. Like a Chinese finger puzzle so to speak slides in but not out.
3 I took a small plastic funnel, cut the end off, slit the tapered tube of the funnel along the side, wrapped it around the clutch rod slid it under the fingers into the MC and pulled out the clutch rod! I did this first to a worn out hunk o junk unit. then the good one and replaced the rod and it works fantastic!
hope this helps you out! and I'll see about some pics later
Oh ya the bushing is available in the "HELP" section of parts stores there are some transmission linkage bushings in it for autos and one for the clutch. cost $5or so
Looking at your pic your pin is worn out! and the rod eye is too. that pin and the tab it's welded too is replaceable from ford. you need to unbolt it from the cross shaft to do so and it's a ****** to do in the truck. Don't ask me how I know!
Maybe takea look at the firewall reinforcment article in it's entirety here you can see some more pics of worn ends and so forth, perhaps it will help
this one is more complete than what is here at OB
http://www.fullsizebronco.com/forum/showthread.php?t=186116