Vinnie - nice, clean work. I don't see any glaring construction flaws or misalignments to carp about. Tamiya's model is basically elegant. For my eye, that translates into a "cleaner" look like you finished.
Personally, I would paint the winch cable a different color - steel instead of rope. The only other thing worth mentioning, but I can't tell for sure, is the appearance of decal silvering - this could be an artifact of the photo image process...
Like Ken said, it would certainly benefit by adding more indicators of "use" like scratches and the like - but doesn't require them to make your effort any better.
You did us truck lovers proud!
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Build more trucks! Heh heh...
Gunnie