Here's my K5 I'm working on. It's a daily driver (yeah gas prices hurt a lot), and I don't make enough to do a lot of work on it at once, but slowly it's gonna get to where I want it. I picked the truck up in October 2004, and have since done a little bit of work to it.
That was what caused my first real 'upgrade' on the truck. I got stuck in a sinkhole on that old road (there was a bridge I was trying to get around and couldn't see through the grass where the pavement had sank over a foot. I wasn't in 4WD when I got in the hole, so I had to rely on the original automatic hubs to lock up for me so I could get out (yes, the whole truck went in the hole). But if you look at the driver's hub, you can see where grease had leaked out of sorts. Long story short, that hub got chewed up real bad and it has a decent set of Warn manual lock-outs.
We had over a week of rain, so I decided to go terrorize the back roads a bit. This was a spot where I could actually let my girlfriend out to take an action shot without her getting too dirty, I would have had some excellent photos, but she wore a good pair of jeans and shoes (and can't hold a camera steady to save her life). I know some of you might think going through the county roads bad etiquette, but the roads never get any ruts in them.
About three days after said day spent on the back roads, I had to pay the price with my rear driveshaft ripping off the U-joint. Not ripping up the U-joint... but coming off the U-joint. Never really heard of that happening before, but I was just lucky it happened at low speed and not the 60+mph of the road I was trying to get onto.