[Yukon Jack]

Swapping in 2.5" springs will be very straight forward. About the only thing to worry about will be possibly having a bolt or two seized. When I pulled off my K5's old lift springs for new ones, I had to cut the front leaf spring bolts on the front of the springs as they were seized to the inner metal sleave. I used a cut-off wheel and carefully cut the bolts between the spring and the hanger mount.

As you swap out the springs, it would be wise to get replacement bushings for the front spring's rear hanger at the frame location and the bushing for the rear hanger too.

I got all greasable bolt/bushings from OffRoad Design when I did my lift on my K20 and K5.

With that minor lift you shouldn't need to do any steering corrections, other than maybe having to adjust the drag link a touch to get full steering left and right.

Brake lines should be fine as should your driveshafts.