[JohnJL]

That line provides vacuum to your brake booster. A minor kink shouldnt be an issue but if you
1. kink it so no vacuum is applied then your booster won't be helping you much or
2. if you puncture it or disconnect it you will have a major vacuum leak which is a problem for your motor.

I've recently replaced my fuel lines with braided ones. You will want to drop your transmission and motor to do this. Be sure to zip-tie the new lines up and away from your throttle linkage.

I suggest not having any connections in your lines in the tunnel. Connections are the most likely failure points so you dont want them inside the cabin, even in the tunnel. Have a continuous run on the feed and return side through the tunnel to the pump and tank.

You dont necessarily need ss fuel lines. I replaced mine due to flow requirements but if you are stock or less than 400hp you probably don't have any need to increase the line sizes. Also, those hard lines are much smaller OD so are quite compact and durable as-is.