Not an old truck, but my 02 Ford Escape turned 276,000 miles this past week... and I don't really know how much longer it's gonna last...
It has been a really good vehicle, 29 mpg.
Had 3rd gear replaced and put 2 timing belts in it over the years. Changed the oil pretty regularly.
Clutch pedal bushing (nylon) wore out twice. Master clutch cylinder had to be replaced a couple years ago..

Gonna go look at a newer one tomorrow. (Last day of the month... good time to shop dealers....