Well. there have been a few:
Followed factory path on one but using 1/2" hardline.
On another 1/2" deal, ran inside R/R rail along subframe tie and along inside R/F rail.
Racecar also 1/2" is inside R/R rail, rocker, along outside of R/F rail, through apron using bulkhead fitting.
Another was 3/8, factory routing.
All use aluminum hardline, well secured & sleeved, AN fittings & hose at vibration points (pumps).