AC hose question

My 73 Sport was a factory AC car. As part of my build I'm replacing the underhood pieces. Have a Sanden compressor and new condenser and dryer. My question concerns the hoses. On the stock setup, the hose from the small firewall connection to the dryer was a piece of formed metal tubing. I can make this work again, and it's not as bulky as another hose would be. Is there any reason this piece won't work as long as it's cleaned up? I am an absolute novice with AC and so don't know what works and what doesn't.