4.8 into 74 3/4 ton 4x4

[70inbville]

I have been given a 4.8 that probably needs a new rod to make it go. I just have concerns about if its enough engine for that truck? Was thinking about swapping out a 5.3 crank and rods and use the flat top pistons to make it snort a bit more. Then I looked up that the original engine only had 160 hp and the 4.8 is like 250 hp. another concern is that it has the np203 transfer case and I don't want to tear the chain out of it so I'm not worried about max hp. So my question is anyone done this and how is it going. my plan is:

4.8 with vinci mega torque cam
sm465
np203
4 in lift
35 in tires

it will be a DD and weekend hunting rig,

thanks for any input.

Chip