Cam Swap pointers

Hello all,
I want to swap the cam in my stock 318 in my 73Scamp, while I take it apart to add a edlebrock intake and 4barrel carb. I will also replace the timing chain, but want to keep the engine in the car, because if I pull it, I may as well wait till I finish my 360 for it, but no idea when that will be. I just want it to be a bit faster as I tool around in it. SO here are my questions.

1. Can the swap be done,while engine in car?

2. Is it necessary to swap the cam bearings? if so how hard is it to do?

3. Any special tools needed besides pulley puller?

4. Anything else I should replace while I'm in there such as water pump?

5. Any good links for swap or break in?