Welcome to the forum Jon
Congratulations on the c15a
You are right with the chev c15a 1941 cab 12
It does look to be in good order and dosen't appear to be missing too much
Good price too
They don't usually have chassis numbers and the main identification plates are located on the drivers side panel of the engine cover(3 piece engine cover)
Engine number is located on the drivers side of the motor ,usually just behind the distributor on a flat section,sometimes in front of dizzy or behind valve side plate
Do you intend on an original restoration ?
Post a few pictures of the internal cab and dash array
Good luck with it