Don't know the answer but maybe you can figure it out from here...
http://chevy.oldcarmanualproject.com/shop/1942/42csm0206.htm

Kent


1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix