The seller describes this as a 45 rolling chassis and also as a 1952 CJ-2A. However, the fact that the front frame rails are boxed and the fact that the image of the original rusty frame had hinges suggests that the frame is an M-38 frame.
https://www.facebook.com/marketplace/item/604443256755306/
“I have rolling chassis 45 willys cj2a I have new transmission cross member rear bumper and steering ball joints”
Good catch Dave!! Frame anyway looks M38