decode a dodge truck vin

I have looked and tryed to do this on my own
but it come's up as a van or a 440 truck,or 5.2 liter.
I did read something that said truck eng code is omitted,
Don't know what that mean's but if someone does let me know.
My vin is 1B7GD14T1FS640857.This is something that I would like to know,
Making sure it's not a /6 truck.
The truck now has a 400B block and I am going to pick it up saturday.
Thank's for your time. :thumbup: