I cut the crossmember in my 40 to make room for my auto transmission.

I used some 1x1 square tubing with some steel plate welded into the remnants of the original crossmember, in an attempt to strengthen the area. The 1x1 bolts into the steel plate so the members removable.

No idea how much support it will add back but it's what I'm going with.
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1940 1/2-ton
Low skill and low buck build
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In the dark of night, she's a looker.