Model: 9783-HD
Serial: 3978303164
I've done a little research in decoding the serial number and this is what I've come up with. (no idea if I'm bang on or completely wrong)
3=1953
9=GMC
7=3 Ton (9700)
8=179" wheelbase
3=cab
03164=3164th truck built in 1953
Engine:G43016
Body serial:332
Paint:330
Trim:394
And its rated for 17500 lbs