Exhaust tube to make fuel filler tube???

[scherp69]

As some of you have seen, I decided to put a Camaro filler neck onto my Acadian (Nova) but now I have to figure out how to connect the filler tube to the gas tank. I was thinking about getting some standard exhaust tubing and running it through the floor (welded of course) and running it to meet with the tank filler tube. Is there any issue using exhaust tubing to do this? The outside will be painted and matched to the underside and trunk, but want to make sure won't be an issue running fuel through it. Thanks in advance guys.