I'm with you. Years ago with my turbo install I had to "massage" that line as well. They are very thick and make of steel, so pinching is less of an issue as is work-hardening. I can't remember how I bent it, but if I was to do it today I'd probably heat it up and try it that way, but have a spare on deck or another vehicle as backup.
I'm sure I bent it cold and just went for it. Never leaked, no issues. The only trick is to bend it in a way that still lets it sit in the vibration dampeners, so keep that in mind. They are pivotal to keep the lines from vibrating until they crack-- been there done that!