Roadkill and Roadkill Garage are the only REAL reality car shows. I have to credit them with motivating me and getting me out into my garage to finish my project.
The Strope or Kindig or Joe Martin shows are real. While they don't walk through it step by step you can glean some tips. The Power Nation shows are indeed like an educational channel. Shows like Worman or Sparks have quite a bit of over the top shenanigans but you can still get some good tips. In Worman's case he's like a classic Mopar training video these days. A far cry from the first few seasons. There is still the dancing, corny jokes and his movie obsession but if you're a vintage Mopar lover there is a ton of good info in the show.