L96 swap into 97’ Sierra 1500 Z71

Hey guys, I have a 1997 GMC Sierra 1500 Z71 with the 5.7 vortec and 4L60E with 385k miles on the motor. I have the opportunity to buy a wrecked 2013 Chevy Silverado 2500 with the 6.0 Vortec L96 And I assume a 6L90 trans with 120k miles for fairly cheap. Has anyone swapped that new of a LS into a OBS? If so, how hard was it and what’s all needed besides the obvious stuff computer, harness mods, motor mount mods. Also would you try and swap the 6L90 in with it or just install a new 4L60 ? Any write ups on a similar swap would be appreciated! Thanks!