Non A-body question

Lots of truck use unlevelling kits around here.
Usually 2”.
I had issues replacing axle shafts after a levelling kit was installed.
The new axles wouldnt flex to the angle needed to install. I think some slightly used axles would have gone in.they were tight.
First time i had a problem like that.
I wont go into what lift is better.
No matter what tires you are making clearance for,they will wear. 30,000 kilometere is about the average life of most oversised tires.
Knobby ones grind off faster.
Finding tires that last, i havent seen many.