[Jaydee]

First biggest mistake is to open the hood and let more air in. Open it 1 inch and aim your extinguisher through the gap. And hold your breath. The powder will get right up your nose and you die coughing.
That's why I like LPG. You can't soak stuff in gas. It won't drip onto hot exhaust. it won't fill up the intake valley if your carby overflows. And any sort of leak can be smelled a long way.
Still very sad to see a Nice car go up in smoke.
Sorry about your car.
JD