Pick up a good rebuilt engine for it from PAW or Summit, rent a cherry picker, and spend a few hours some Sunday with a couple of buddies and swap it out in your driveway. Not much easier in this world than swapping engines in a Chevy Pickup, even the later model ones with all the computer crap. Just tag and label all the wiring harnesses with a piece of duct tape and magic marker, same for the hoses, drain all the fluids and go for it.
If you don't want to go that route, don't know any good shops in LV, but if you can drag it over to Pahrump I can recommend several who will do it and not charge you an arm and a leg, and who will stand behind their work.