FWIW - I had 3/8" aluminum hardlines from my tank to near the engine for nearly 8 years before I tore the car down. Never a leak or issue with it, and it was definitely secured improperly. shruggy

That being said, I can't say that I wouldn't feel comfortable doing that.

1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
2020 RAM 1500
[img]https://i.imgur.com/v9yezP9.jpg[/img]