PLASTIC MODEL REFERENCE KIT
I bought this Tamiya 1/48 plastic kit for reference.
The CARF is a 1/4 scale plane (actually 23%) so it's easy to upscale a unique part on the plastic kit by multiplying it by 12.
This kit has the very unique Tropical filter used in the Mediterranean action. With the inlet so far forward it should be easy to get lots of air to the fins of the engine by using good baffling.