The clockspring is the interconnector in the steering wheel so you can turn the wheel, and the wiring needed on the wheel itself can exist. eg, airbag wiring, cruise control, radio controls on the steering wheel. The unit has about 4' of wound metal with conductors on it to relay the signals back and forth from the wheel to the rest of the truck. .
Tumbleweed: move your steering wheel around a bit to see if there is any play in the interior column. . If your truck has over 100k on it, I would seriously check the intermediate steering shaft, which is in the engine compartment. Do a rotational with your hand, and front/back. If there is any movement, it may be your problem.
On another note, if you dont have a fuel pressure gauge on that 99 24v yet, now would be a very good time to get one on there. Many an injection pump have been saved by monitoring the pressure. .
mebe bob can explain it better heh
-j