There are 2 drawings for part 74-78172 available in AirCorps Library

Manufacturer's Drawing

Vultee Aircraft Corporation,   BT-13 Valiant Drawings,   Page: --,   Revision: Reel B-19  

BRACKET ASS’Y. – JCT. BOX SUPPORT L.H.

Associated Aircraft:   BT-13  

Manufacturer's Drawing

Vultee Aircraft Corporation,   BT-13 Valiant Drawings,   Page: --,   Revision: Reel XA-23  

BRACKET ASS’Y. – JCT. BOX SUPPORT L.H.

Associated Aircraft:   BT-13