8.25 to 8.75 swap... driveshaft??

The swap will move the center line of your front u-joint 0.66 of an inch forward.

The redneck fix is to drill new perch locating holes about 5/8" forward of the existing holes & use those instead of the factory perch holes.

Measure everything! If you have oversize tires, make sure you still have room for them in your wheel well openings.