When I built my Vette, I was friends with one of the local track's NHRA tech's. He told me that absolutely no fuel was allowed to run through the cabin area of the vehicle. I had to run mine under a cross member ahead of the LH rear tire and it follows inside the frame rail to a regulator on the fire wall. It always freaked me out because I thought if it ever got a hole put in it I'd be skating. But every tech passed it every where it went and got tech'd. Even if you read the rule book there are gray areas so it would have been nice to get Tech's ideas on this.