Vegas is in CA!?! :poke:
NV luckily has a rolling smog exemption. I forget what the age is, but it goes with the car and not the engine (at least 3 years ago when I was there..) and my 72 was definitely exempt at the time.
Here's a good video that gives an idea of what the various operations are and what they kinda look like. The actual machines vary slightly and the level of computer involvement varies substantially by facility. But you can maybe get an idea of the various tools, equipment, and need for various fixtures that are unique to particular engines.
There's lots more to know and understand, but this is a good overview of quite a few common operations.