88 Chev Crew Cab build in Oz

[kdubbin85]

Hello, i've been looking at Chevytrucks.com for a while now and been wanting a Crew Cab for years, finally got one I tried to get a 4x4 imported, with no luck, so i had to buy a 2wd one here and will convert to 4x4.
Any information would be great on what front diff- dana 40, 60?
I want a 5.9 Cummins and a 5spd gearbox and transfer case to suit 4x4, what are my best options? I've read the NV4500 & NP205 Transfer or a G56 Transfer are suitable... I'm not sure what parts i can get here is Australia...
At the moment i have a turbo 400 and a 454 in it.
Here are some pics to get started! I will post pics as i build