Brad, I always use Don Moen\'s AD Serial Number page to decode AD numbers. If your VIN was 5FS-D1655, you would have:
5 = Kansas City, MO assembly plant
F = 1948 model
S = 3800 series (1 ton)
D = April
1655 = sequential assembly number

Hope this helps.


Jeff Nelson

"Beer is proof that God loves us and wants us to be happy." - Benjamin Franklin
"Always do right. This will gratify some people and astonish the rest." - Mark Twain