Cured the exhaust fumes issue with this:
Air fed mask!!!!
But on a serious note there was an exhaust clamp missing (!!) on one of the down pipes which I guess when the car was pressed hard the joint opened up and allowed gasses to escape.
This joint was under the drivers side wing.
Completed 240 mile trip today with roof off...no fumes
RESULT !!!!!!
Almond Tart
