FWIW, I've have 1/2" aluminum hardline on a few cars; one I did 34 years ago, another 25 years ago.
Both are still just fine, never a problem or a leak.
Support (adel clamps as noted, one car has a few tie-wraps along its subframe tie) them so they can't vibrate or flex.
I prefer to use fire sleeve over the aluminum, but haven't always (did a couple vintage T/A racecars as well, now that I think of it).
Use hose at both ends to connect to pump/engine, 6" is enough.
Check your AN fittings to be sure they're not significantly smaller ID (some are), and use a larger-ID regulator.