I have a 360 car with a 727 and a previous owner cut off the steel lines and replaced with rubber. I dutifully bought new SS lines, but they are bent to fit the box. The last time I had the car in the air, I couldn't figure out the routing and which bends needed to be unbent, so I put them back in the box and decided it was a winter project!
I've since bought a used original service manual from Amazon ($2.99 - LOL), which will make it much easier to tackle the job!