A= 39-41
C= conventional cab
100= 1/2ton
A228- bearing designation/engine displacement
39 no park light on the fender
40 park light on fender
41 headlight on fender park light on top of headlight.
the title number has the engine size and sequence #. if this is correct the engine could be from 49. look at the date codes on the block and head to verify what year it was made
