According to this, all the trucks except COE use the same box,
http://chevy.oldcarmanualproject.com/1929_54chevyparts/06/393.HTM
so you can rest easy there.
In my parts book, Section 7.234 list mounting brackets for steering gear.
1937-1946 ALL COMM. and UTIL. (exc. COE) casting #594460, part #594460
1939-1946 COE casting #3650577 part number 3650577
Joe

Last edited by Joe H; 04/05/2011 4:02 PM.
1937 Chevrolet Inline-powered Streetrod