Yes the FSM(or Haynes/Chiltons) does make the CV replacement sound easy, but it isn't. I followed the FSM to the letter the first time I did one and I couldn't get it out their way either, after about an hour of trying it by the book I ended up removing the upper BJ.

If the BJ's are in need of repair it will be easier to just disassemble the entire wheel assembly(hang the caliper so you don't have to bleed the brakes), and remove everything else. Front end maintenance tends to be something most people don't do, or they only replace the items as needed. By rebuilding the whole thing you will be saving yourself a lot of extra labor, and when finished should be good for several years to come, other than repacking the bearings(depending on if it sees a lot of water or dusty roads).

W/my '91(that has ball-joint spacers), I am able to remove the CV by removing the bolts(axle flange and hub side, then having someone compress the suspension. I have to wiggle it back and forth, but it is a fairly easy R/R, a lot easier and less time consuming then dropping the upper ball-joint.

Before doing the tie-rod ends, has the truck had the steering relay rod recall done on it yet. If not, you could wait, some Toyota service centers replace the entire steering linkage(except pitman and idler arms) when doing the recall to save time, my local one doesn't. You will also get a free alignment w/the recall work. Your'89 should also be under the recall notice, as long as it is a truck and not a 4-Runner(IIRC).