On my '42, I mounted a 1954 Advance Design Chevy truck rear view mirror. As I recall I drilled and tapped two holes in the center of the header panel, right where there is an underlying sheet metal brace.

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