NHRA metal line ?

First and foremost. By all means - safety first! I have enough stuff in the wife's car that she could make the jump to pro from sportsman and I wouldn't have to add anything. I tell her that it's because I love her so much. Yeah bullshit. I don't want to have to spoon feed her the rest of her life and wipe the drool from her mouth because I was to cheap to put in a driveshaft safety loop keeping her car from pole vaulting when/if the driveshaft breaks and buries itself in the asphalt at 100mph. It's sounds like you should consider some of the well intention-ed rules as they apply to lines, hoses and such.

I will point out that if you are not running at a NHRA sanctioned track/event. The rule might not apply. I know at our friday night stuff. They check for battery tiedown, radiator overflow and general condition of the vehicle. Friday nites are not NHRA sanctioned events even though we are NHRA