78 crew cab + 06 ccsb 4x4 duramax/allison combo = which route to go?

[BK]

Hey all. Just picked up a 78 crew cab 2wd with a knock for $300 in really good shape, light blue with white stripe. Anyway, it was too good of a deal to pass up. I've wanted a crew cab 4x4 for years, so I figured its time to try to make it happen.

I just came across a (what I believe to be) killer deal here locally. A sub 100k mile 06 ccsb duramax 4x4 that was rolled. Cab and bed have been removed, but everything was done properly, with plugs unplugged and nothing at all cut. Guys asking $2000. Its missing a transfer case(his other truck needed a t-case).

My goal for this truck is a driver, with more than likely a sled deck flat bed(big time snowmobiler), lifted a bit, long distance driver, and for hauling the wakeboard boat around.

I'm leaning towards putting the 78 cab and front end on the duramax chassis, without the bed. This will allow me to get the cab as low as possible, as I've heard the rear frame rail kick up leads you to run the cab very high. By running a flatbed, it will allow me to run the cab as low as possible(I hope). Then I can build a flatbed with a headache rack, atv winch built in for when sleds blow up, flip down small sides for room and wider sleds, and a slide out ramp underneath with some tool boxes.

The other option is finding a 4x4 cclb square chassis and swapping the duramax and appropriate parts into that, I suppose with fully boxing the frame and hoping for the best, but I feel this is a step backwards.

I would rather not have to stretch the frame to match the factory cclb wheelbase as I won't be using a stock bed, hoping proportions won't be off. It looks like I'll be trying to incorporate the bcm into the truck as well, as from what I've read, the 06 uses the bcm for cruise and tap to shift, as well as some other functions. I have the complete donor cab and box, minus the two passenger doors.

Can anyone give me input on my ideas? I'm looking for holes in my plan, things I've overlooked, experience issues, or if anyone has pics or build threads on squarebody duramax body swaps, please lend me info or pics. Thanks guys!