No, the 40 style frame will swap bewteen 1935-40 Ford, along with 1941 pick-up. For the 46, you need a 42-48 frame, a 41 passenger frame may work too, but I think there are a few unique things for that year.
Frame groups: 32 alone all 33-34 all 35-40 Car and 35-41 Pickup 41 car(can work for 42-48) 42-48 Car 42-47 Pickup
Thanks for the info. I'm going to put a Jag frt under my 46 and have a 40 frame. Thought I might do the swap to it before removing mine. It's never that easy is it.