Sounds like clean, grind, and weld in place type job to me. Weld the crack, don’t weld crossmember to frame.

These are often cracked in some form or another.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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