Bastard 64 VIN?? Can't Identify

[dialdin]

Got a 1964 C20 and I am having a little trouble decoding 2 parts of the VIN... any help would be much appreciated. I have scoured the internet looking for the answers but can't seem to find any info.

Here is the VIN: 4C259H127366

So here is what I know:
- 1st Digit: 4 = 1964
- 2nd Digit: C = 2WD
- 3rd/4th Digit: 25 = 3/4 ton

Now here are the problems:
- All I can find for the 5th digit is that if it is a 4 it is a pickup... mine has a 9 and I know it had a pickup CAB but what was on it for a bed from the factory is unknown... cab/chasis, flat bed???
- I have found all kinds of information for the 6th digit and various MFG plants BUT none of it for MY 6th digit of H... anyone know where the heck my truck might have been Built??

Then the last 6 digits being the production number is a no brainer... I really would like to know where this truck was built but MOST importantly, what is the 9 and how was this truck configured off the assembly line?

Any help would be much appreciated.

Thanks!