The 5.0 and 5.7 are identical when it comes to this, I use a long extension on the spark plug socket and use a finger laying along the socket and protruding just beyond to feel for the plug then guide the socket on. It takes a few tries but works for me. Worst case is remove the exhaust manifolds to get access and this makes a good time to inspect the exhaust for corrosion.
1997 2400 SCR
5.7 Vortec / Bravo 2