Older straight axle with lifts is no big deal.i built a 4” lift for my 80 power wagon with 35’s.
my son has the full meal deal lift on his silverado, front and rear, control arms and diff relocated. Lots of money, and work.
Your 2.5” puts the ball joints out of their nominal operating range, as well as the cv shafts. Wheel spacers? Shortens the life of the wheel bearings. Ride and handling are in the toilet.
Your rig, my opinion. Form over function, i get it.
