1955-60 Chevrolet 2nd Series "Task Force" Truck Differences?

[SAVAGE-RIDER]

Hey guys. (sorry if this has been made already, used the search...)

A little new to the 55-60 era, second series chevy trucks.

Looking for someone to shed some light on these awesome trucks to clear up a few issues.

I feel there are so many different trucks it's confusing how to tell exactly which truck is which.

First off we have the,

Apache
Cameo
Viking
Spartan

I'd like to focus on the Apache (55-57) as that truck is the truck I am most interested in.

I've seen some pictures and wiki has a few "titles"..if you will, for these trucks


10
50
100
1420
3100
3200
3600
3800

Could someone explain to me these numbers and explain what these trucks exactly are?

Thanks.