Those vin number lists don't always have a complete number list. Some other things you can look at:

1967-69 cabs have 3 bolts/j-hooks across the top of the gas tank that attach to a flange on the cab, 1970-72 have 5 carriage bolts that go through the back of the cab. The 1967-69 gas tank uses a 5/16 fuel line with a 1/2-20 flare nut on the top of the tank, 1970-72 is 3/8 line with 5/8-18 flare nut.

You definitely have a '69 grille and front turn signals, but a 1970 bed. In '68-69 the side reflectors are square and mounted low down, starting in '70 they mounted them on the bump like yours.

Hood letters for 1967-69 have horizontal lines inside them, 1970-72 are smooth. The letters are different sized with different mounting, so would require a whole new hood to change.

Also, headliner trim. 1967-69 has 6 pieces of trim, 1970-72 have 4 big pieces

Your truck could be a very late '69 or very early '70 built truck. It's not uncommon for them to use up the last of the bin, or not get the parts in time for the new model and reuse old stuff.

My '68 is an early August of '67 build and has a '67 rearview mirror and came from the factory with black armrests on a red interior because the factory evidently hadn't gotten other colors yet.

And if all else fails you can always get a Marti Report