i took one clip off of each cap- 4 per end and soaked in gasoline and then penetrating oil for about 16 hours. i smacked the caps with a socket and 28 oz. hammer till the socket broke and only budged the cap about 1/4"
These may have been the original joints?! the driveshaft shop thinks they are.. 250k miles? is that possible? theyre defintitely toyota though..
also- the photos in the link you sent were of a much smaller driveshaft and u-joint than what i have...