R18 and Jaguar D-type anti-stall gear ratio settings needed

Seems that we have another stalling culprit in the Jaguar D-type.

For the Prototype R18 and the Jaguar D-type, what are people’s anti-stalling gear ratios? This applies to manual + clutch users. I’m referring to the start line and low rpm corners (like the last one on Long Beach before the start line).