Nitrous plumbing A1A...??..

I think its 12" of rubber hose under the hood?
Also i dont think the fuel pressure regulator is allowed to be on the fire wall?

Mine hangs on a home made bracket between the carbs.

Next time i redo the wire in my car i want to put all the components on a board then wire it and jist mount the board in the car.

It looks super clean (bad *** race car style) , is easy to work on in the car and can be built on the bench.
I never heard that one about the fuel regulator on the firewall? I had it mounted on the firewall before and didn't have a problem so that's why I was thinking of doing it.
Also my argument LOL for the hose will be it's just connecting things. it's metal to metal underneath all the hoses... Even the long one is rubber over top of a rigid metal tube... I'll drive it down to the track one of these weekends and having it inspected. The nitrous oxide is still unhooked up electrically and obviously no bottle so it's just sitting there unusable.