being super safe?
 

Having switched to carbs and disabling the airflow switch to shut off the fuel pump, I decided to install an engine fire bottle. Found a used (full, never fired) 5 lb HALON Firebottle and installed it in the trunk, ran 1/4" hard line to the engine with 2 nozzles. Installed a fuel pump kill switch next to the pull handle. IT IS NOT FOR RACING, only for my piece of mind. Also have a 2-1/2 lb. HALON in the cab. That should do it....
http://forums.pelicanparts.com/uploa...1279578827.jpg
Last week, an old 911 (couldn't tell what kind) burned up by the freeway. That kind of motovated me to complete the project.

I've got an electronic suspression system in my 930. It just always makes me nervous if it's working right, although I test it. The mechanical system you have seems like it can't go wrong. Plus, you have the cool, "Pull before flight" safety pin.

On the race car, I powered the fuel pump through a relay with one leg going to am oil pressure switch. If the engine has no oil pressure, it kills the fuel pump. We have a toggle switch to manually power the pump for cold starts.

IIRC you can get something similar from Summit Racing for ~$20.

I have a similar setup in my 911 - T-handle blows the fire bottle and kills the battery.

I learned the hard way with my (dearly departed) 951. There are some things for which there's no such thing as overkill.