New 71' 4x4 and need sugestions

[my kids toy]

Hi all.
This is my first post and I just picked up this 71' 4x4 for my 12 year old so we can get this baby up to par by the time she turns 16
The truck is fresh from puerto rico
I hope I did not pay too much for it, I paid $5000 with issues.
It has a inline 6 but they swapped out the 3 on the tree for a 4 on the floor so it is only 2 wheel drive for now and the transfer case was in the bed of the truck and during shipping off the island someone took the original trans and transfer case.
So I am in need of a v8 and a trans ( automatic preferred ) and a transfer case.

Question 1:
For starters I would like suggestions on what I should find for a motor and trans and transfer case to put in this.

Question 2:
it had originally a wood bed in it but it is gone and has a steel floor, I want to put the wood back in it, does the wood go over the steel flat floor or does that need to be removed , I am sure it does but just double checking.

Question 3:
It has manual steering so I need to swap that out to power steering, what should I get or look for.

Question 4 : were on line should I shop for parts, I want to swap out the steering column and I need a new gauge panel and a new grill.

I will definitely need lots more suggestions on were to go with this truck.