K1 Fuel tank options?

[ironrogue]

I have a 1946 K1 pickup that I would love to locate a factory located fuel tank that is under the front seat floorboard. Any suggestions on how to source this item? As an aside, are there any major differences between K and KB?

 

[Jonas1ne]

Try eBay, IH Parts America, Binder Planet Forums, and vintage truck salvage yards. A KB-series under-seat tank will usually fit a K1.
Main K vs KB difference is mostly styling KB trucks had the wider grille/chrome trim, but mechanically they’re very similar and many parts interchange.