ok spent a little time in the Chevrolet 29-50 parts book, 39-40 p/n 1.285-3653740 lower radiator shell baffle is the part number we are talking about.
A Merry Christmas and a Happy New Year you and your family!

33 1.5ton Gas Delivery truck in the making http://s971.beta.photobucket.com/us...delivery%20truck%20in%20Col-Tex%20colors
40 KC panel truck in the rough http://s971.beta.photobucket.com/user/tlthorne/library/1940%20Chevy%20KC%20Panel%20truck