Nick - When I can get back to my laptop tonight, I’ll see what I can find on the cross member part info.

In the meantime perhaps some of our 1941-46 1/2 ton owners can measure their transmission support cross members between the frame rails to compare with your measurements???

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)