Some questions about modifying A/C

[MattO]

So I'm foolishly diving back into my GMC Canyon that I've already spent WAY too much money on. My new turbo setup is ready to go in, but one of my A/C lines is right in the way. The way everything is laid out, I think the best route is to weld a 90* AN fitting at the bulkhead connection and then reroute the line for clearance.

My long winded question is, what are people using to make customer A/C lines? Do I just use normal AN lines and fittings, or should I use something else?