Technical X member compatability

I have a '48 Ford Tudor that's had the x member cut out for 394 Olds/B&M Hydro swap and am looking to go back to a flatty. What year chassis are compatible with the '48? I'm thinking it is '42-48 but am hoping a '41 would work also as I might have one lined up.

Thanks in advance for your advice.

 

41 car is the same. 41 pickup is not the same.

 

Thank you Kato Kings!