Welcome from Boston.
Nice to see one of these earliest Wagoneers brought back. This one looks complete and in good condition for it's age and prior neglect. Likely it's Spruce Tip Green metallic, an excellent color.
Firstly, suggest you get the factory manual for this vehicle. Looks like it's only available in paper, but it's not expensive.
https://www.rockauto.com/en/moreinfo.ph ... 35&jsn=419
There is also a '62-73 J-series parts manual online here:
https://oljeep.com/edge_parts_man.html If you can find your parts by factory part number, that's the best way to ensure you get the right part. Also there are some pictures in this book that may help you.
VIN number look-up is here:
https://www.ifsja.org/tech/figures/index.html Kaiser did not follow the GM model of a new model release every year, and the build year is not in the VIN. "1414" is the base Wagoneer, with a sequential serial number following.
A 6-lug axle is '74 or later. These are better axles, but of course won't work with your existing wheels. There are other issues: the '80-up axle swap to a driver's side drop, and won't match your existing transfer case. A '74 or newer rear axle from an automatic Wagoneer is offset, which could be an issue with your existing centered transfer case.
These earliest Wagoneers have a significantly more obsolete drive train than '65 or newer, or better still, '74 or newer. The OHC 230 was nearly universally hated in its day, and Kaiser dropped it domestically in 1965 and switched to AMC commodity engines (a Rambler six and the AMC 327 V8). They use a Borg-Warner automatic transmission, with a single-speed Dana 21 transfer case. Realize a 4WD station wagon with an automatic was a new thing in '62, and the componetnts got significantly better in '65 with the AMC engines. Jeep then went to a nailhead GM TH400 and a Dana 20 2-speed transfer case.
You can pretty easily fix the front axle, I think. This is a Dana 27, and a 27 from this era is not in much demand... realize that the 27 from a CJ uses a different passenger knuckle than the Wagoneer or Jeepster, so don't buy an axle from a CJ if you need the passenger side knuckle. The driver's side knuckle is the same as a CJ, and both knuckles from a pre-74 J-truck will work too.
You can buy the service parts for the axle (seals, bearings, etc.), but your only source for a new knuckle will be from another Jeep.
Watershed years for these Jeeps are 1965 (end of the 230), 1974 (new axles), and 1980 (driver' side drop, switch from the TH400 to the TF727, switch to New Process driver's drop transfer cases).
IMO you have two main issues to confront with this Wagoneer. First, the major components were already dated in 1965, and antiques today. You'll need to decide how to address that, either by bringing them back or a swap. Second, if you decide on a bona fide restoration, parts may be an issue. A modest number of these Jeeps were built, and much of what you'll need is unique to them. Rebuilding the 230 may be challenging. AFAIK there is no source for camshafts, and maybe no source for cam chains. Maybe there is some help on the M715 site.
http://www.m715zone.com/vb/forumdisplay ... Discussion
Sorry if this seems negative. There's a lot to cover regarding these earliest Wagoneers and J-trucks. Not a lot of them are still around, and even fewer that have not been converted to more modern components.
Suggest you search here and at IFSJA.org for everything you can find related to the OHC 230. You might also search other keywords like Kaiser or "Dana 21."
https://www.bing.com/search?q=site%3Afs ... om+OHC+230
What's your location?