Suspension questions, problems, advice

So. I am coming close to pulling the trigger on a new pro comp 6 inch lift (insert generic negative 6 inch lift response below). Along with trail grapplers and fuel maverick wheels.

My questions (I have searched but I may have a unique situation):

Will 34s fit with no cab mount chop and/or rubbing (will be with 18 inch wheels)? Nitto Trail Grapplers measurements should be 295/70/18

What might need to come before or along with that is a repair. My 32s have actually been rubbing badly on uca and lca when close to or at full lock for a long time now. That could've been contributing to a little accident I had sometime ago with a castle nut being destroyed and splitting that whole area apart (read more here). Yet from what I understand, 32s should not be rubbing anywhere, lifted or not.
I have taken to 2 different shops twice since my little incident, to replace parts. But in the middle of that, my truck started making a loud CLUNK in certain situations, like on an incline or decline, mainly with turning. Then more recently, when applying the brakes (sometimes) a loud POP. I'm thnking I may need to replace my axles, and that a brake pad is slipping. I can feel both situations right underneath my feet. But I don't know for sure. The mechanics could recreate the sounds, but couldn't pinpoint what it might be. I figure someone has had similar problems. Or some insight.
It would be ideal for me to get everything done at once.

 

Anyone?