UGHHHH! I had this big reply typed out and now it's gone. Stupid ice storms!!!
A couple of things I remember saying:
Unfortunately I don't know anything about 66's so I can't say what's rare on both, but....
There's a brass bushing at the front axles that is hard to find. I found mine at quad4x4.com after much searching when I rebuilt my front axles.
The turn signal lever and horn button can be hard to find for 62 models but if you're just going to work her you might not care if it's year specific. They make generic ones.
Also they don't make the curved windshields in clear anymore that I know of. All the ones now are made in mexico and have the bluish tint to them.
But the curved windshield is way cooler than anything else so it's worth it to get the 62 if you can. God intended two things to be curvy, and they both start with "W". Women and Windshields!
One more thing, the 62 is a "knee knocker" design so watch your knees. 10000% better looking than newer models, but you may end up with bruised knees gettin in and out if you're a big-ol' boy!
Other than that I can't think of anything else. Welcome to the '62 world! It's a fun ride!