Hi Garry,
I'm in the restoration process and have been for the last 20 years, never driven the car on the open road.
So I'm working on anecdotal stories of overheating in traffic, and that the auto box does not have a secondary cooler with the radiator.
The shroud will definitely concentrate air to the radiator, so a positive result to lower the overheating prospects.
No airconditioner.
I'm looking for reliability as the car will be as new and used regularly, and for long distance use, so don't need overheating issues in remote places.
The car is faithfull to factory build, but I see this addition as insurance.
Cheers,
Mike