That is an unusual F-head engine hood modification. The Willys-Overland hard top looks great. I don’t think the grille looks original (the parking lights appear to be a later model). The overdrive isn’t original either, as it hadn’t been developed as of 1946.
“Offered for auction is a classic 1946 Jeep. This jeep has been family owned since new. It is so old the VIN # is 65111. It is all original except for the installation for an up graded F-Head engine in the early 1950’s. The hood scoop was added to allow for the room needed. It has “dual-matic” front hubs and a Warn 20% reduction overdrive all standard. This rare old jeep also has the original metal top and a heavy duty (tropic) radiator. The tires are new. This jeep runs perfectly. It is ready for restoration or modification. It is a great example of solid steel construction from 1946. A true American Classic. Bidders please note it is offered locally as well.”