Replacing Hard Brake Lines

Has anyone replaced the long hard brake lines that run from the front of the truck just under the driver door to the rear on a 2011-2015 Tacoma? One of the lines is seized on the rear and I’m weighing my options. I’m letting it soak in penetrating oil overnight but just may replace both lines since the fittings are corroded. I know the gas tank would have to be dropped but I’m unsure if the drive shaft frame support would need to be removed as well if possible.

 

I've had good luck with this on stuck brake lines. Just don't get it too hot.

 

Have also heard some heat will help get those unstuck.