I built the AMT kit last year, in my 'hometown' colors. It's an awesome kit and still (I believe) readily available.
Be aware that it represents a more-or-less 1960s version of the prototype, and 1970s-era molds. Lots of sinkholes and seams on nearly every piece...but it's an impressive slab of plastic when finished:
Congrats to your dad on his retirement! It's a great gift idea.
Cheers