I was not getting "neat petrol" but I was getting a strong general engine oil/petrol smell from the air vents. It was more pronounced when hot and the use of A/Con did not make any difference.

I cleaned the old sponge remains off the top of the air box just in front of the windscreen under the bonnet using white spirit and a knife and then applied the double height layer kindly provided by the factory. This sealed the unit up against the underside of the bonnet, leaving water drainage at the front, and it was significantly changed.

I think the natural degradation of this foam material on the car from new means that my low milage 05 car was about right for replacement so it would be interesting to compare yours for reference.

I will get that picture I mentioned above for reference.

HTH

Everyone loves a Morgan. Even me, unless it's broken again.