Transfer Case questions for the clueless

[Brad54]

I'm new to 4x4 trucks.
I've got a '76 Dodge that had a full-time transfer case, and auto. We swapped it out with a donor from a '78 Ramcharger that is part-time. I don't know the designation of the case, but it does what I want it to. (also swapped the tired BB out for a new Magnum small block crate engine, and the auto trans for a Granny 4spd.) Eventually, I'll get the donor front axle under the truck too, so I've got lock-out hubs.

Basically, I had to replace the entire driveline just to get what Chevy sent from the factory a decade and a half earlier! 2WD Hi, 4Hi/4Lo, Granny 4spd and lock-out hubs.

I've got a '62 K10 that I'm going to start over the winter.
I know nothing about the t-case in it.
What trnsfer case am I dealing with? What are the good points and bad points about it?

What are the differences between it and the NP205?

And if I have the opportunity to replace it with an NP205, should I? And why?

I'll be using a New Process YM6 4spd OD manual trans ahead of it, and 3.23 or 3.42 gears in the diffs (.72:1 OD). Maybe 3.55, depending on final tire selection. It will be a daily driver, and I'll use it for hunting and camping, and maybe light mudding and trail riding. Won't be rock-climbing or doing anything too aggressive with it, so I don't need deep gears or Granny lo (past what 4Lo will give me).

Will also eventually use it on construction site type of environments.

Thanks,

-Brad