Jeep Production
 

This short video destroys any argument on the engine colour for Willys Jeeps. Check the bloke blasting olive drab paint over EVERYTHING.

https://youtu.be/PfpC3vaaAko

Yep
 

I've laid eyes on a NOS Willys engine . I was down in Yarram in 1979 helping out with a natural history display, I found a local Jeep owner with his Jeep he had purchased in 1946 ... he mentioned a new in the crate spare engine that came with his Jeep. The Jeep was a battered wreck but he had recently fitted the new motor.. yep olive drab all over and that cosmoline gunk was there too. BTW the jeep was LHD and registered ... vic prefix GB