The Stovebolt Site Forums The Shop Area Interiors VIN ID TAG

http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsmA2.htm

I think that hex-sized clutch-head attachment screws were still used in 1949 (up through 1950)?

http://www.oldchevytrucks.com/blog/index.php/tag/id-plates/

These "rivets" were used after 1950 but you could use them on yours.

1949 reproduction ID plate