Best thing you can do is eliminate any factory prop valve, hook the front lines together, install an adjustable prop valve to the rear. Summit Racing has em.
I can guide you through this.
Here's a possibility on a creaking sound in that area.
The track bar mounting bracket at the left frame rail can move if the bolts aren't real tight. .
BTW, the factory torque spec was too low. Hope this helps.
what fancy tools do you need to check connections?
Did you check out my Tips and read the introduction to each one? That might help with your understanding their importance.