[69gmcc10]

Can you post a picture of the centerlink for us, please?

What are the alignment specs? Like PGSigns alluded to it sounds like you may not have much caster and that will give you a sense of wandering and lack of any resistance in the steering leading to no confidence in steering.

What can you tell us about the power steering pump? is it a retrofit? Picture? Newer model pumps have different valving in them giving them more pressure and flow and this can also cause symptoms you are describing.

Your bouncing issue is probably going to be easily corrected with different shocks or "shock relocation kits" found on our vendor board. Quality shocks will make a large difference.