Oh yes...a scoop...I made one many years ago...useless...would need to stick out around 10ins to get into the airstream...thats the prob the heaters air intake is in the wrong place....mine is routed to the front grill on the pass side goes between the rad and inner wing and is in the airflow behind the grill.

Dont even need the blower of now...toasty...to hot in the summer.

No further mods req...no doubling up on the matrix...it works a treat.

NACA is the predecessor of NASA and its half a divergent duct,, so speed decreases and pressure increses as the air goes in.

Here's one, whether it would work as Series speeds is another matter
https://www.ebay.co.uk/itm/NACA-ROU...934090?hash=item2877ffa38a:g:naQAAOxygo9Q8J9~

Wont work on a Landrover in the std position.