1964-66 truck VIN help

[tractorman86]

So where do I find the vin on my truck, I want to sell it but the title I got with it dosent match the door which is obviously not the original door, any help is greatly appreciated.

 

[foxman]

Using a morror, look on the top of right frame rail just below the heater box. You should find it there printed backward so you can read in mirror.