Back seat question

[RobbieRacer]

On my 79 Mustang stocker I want to leave the back seat in. My Roll bar will go thru the speaker holes. my question is, do I still have to put in a aluminum rear firewall behind the seat, due to the fuel cell in the trunk, or will it be ok without it?

[Chris1529]

I would say the answer is yes because the seat doesn't close the area off clear to the glass. I would do it anyway for my own safety even if it wasn't required by rule.

[Carguy49]

According to the 2017 rule book if a fuel cell is used you must remove the stock tank. The panel between the trunk and the interior must be covered with either .032 aluminum or .024 steel. Hope this helps you.

[RobbieRacer]

Thats the way I read it too but it never hurts to ask people who know for sure.

[Sean Marconette]

With a hatch you will need to seal off the hatch to separate the trunk area from the driver's compartment no matter what you do. If it's a notchback, then you will still need to add the firewall. I have had tech people inspect how I sealed the hatch more than anything else on my car at multiple divisions. Since you have a notch back, you will need to cover the backseat and possibly the deck plate where the speakers/rollbar is. Make it seal good and no gaps otherwise it could be questioned.

Sean

[RobbieRacer]

What is the best thing to use to seal it with?