‘46/7 cab swap to a ‘40/1?

[Vanspeed]

Hi guys. Hoping to get some good feedback here as I do not know the floor differences. Building a ‘41 half ton for my first customer. The ‘41 cab needs a lot of metal repair. I found a ‘46/7 that needs nearly no repair. I understand the hole for the gas tank neck and the tank being under the seat but what else is different? Holes for front fenders I think need to be added. Will the floor allow it to bolt up to a ‘40/1 pickup frame?