Andy is correct (‘49 installations would have been to consume existing stock) in addition there is the two-piece headliner center bow. This includes a piece spot welded into the cab and a screw on center bow, later superseded by the floating “S” type. There are other subtle changes, screens instead of paper on radio grills, ‘48 only park brake dash bracket “knee breaker.” Several running changes to the cowl vent on the driver side, etc.
Welded in piece for center bow 47-early 49
https://www.flickr.com/photos/advance-design_parts_co/18770380205/in/album-72157631867396207/
47-early 49 windlace retainers and "T" finish trim piece that aligns with top bow:
https://www.flickr.com/photos/advance-design_parts_co/9531186115/in/album-72157631868452754/
https://www.flickr.com/photos/advance-design_parts_co/9531186671/in/album-72157631868452754/
47-48 grills with screens:
https://www.flickr.com/photos/advance-design_parts_co/8599570908/in/album-72157631868452754/
Knee breaker:
https://www.flickr.com/photos/advance-design_parts_co/8129417381/in/album-72157631868452754/

Last edited by Brad Allen; 11/21/2019 9:26 PM.