Hope this helps, Skinnedknuckles

http://www.1954advance-design.com/A-D_factoids/1948.html
http://www.1954advance-design.com/A-D_factoids/1949.html

grill and "back splash" colors (see pages, above)

hood emblem composition: die cast metal in 1948, or, chrome plated steel (1949)

inside door handles pushes to open (1948), or, pulls to open (1949)

headliner bow screwed-on in 1948 (and in early 1949), or, "floating bow" (in late 1949)

3-speed transmission: floor-shifter (1948), or, column shifter (1949)

Some/all of the above features might be nicely illustrated in this Stovebolt.com Tech Tip: Stovebolt Spotting Guide -- 1947-1955st