Camaro Subframe bushings replacement - Help needed

[74camaro]

Hallo, everyone. I wonder if you could give me some help.
I need to replace the bushings of my 73 and 74 Camaro sub frame. I have no intention to make it by myself, of course! This is far beyond my capabilities. But, as always, I like to know a little about what someone will have to do in my car.
I have searched the web and what I get is a wide range of opinions. Also, the repair guides I have don’t say a word about it (Haynes, mostly) and that’s not ok for me! A guy I know even told me this is a very dangerous process (!), with extreme risk for the car windshield (!!) and for who is working on it (!!!). Wow!
So, I wonder if you had any experience replacing the bushes and if you know about a step by step guide for it, somewhere out there.
Thanks,
Nikollas.