I have heard of using the big bolt front end, but I have never seen it on a pickup. I'm thinking that it would look funny with the giant wheel openings with ~30" tires.
Maybe not. Tahoes are for the most part 4x4s, and the factory tire sizes run in the 30-32 inch size range. If that is the intended end goal with this particular project, it may not look too bad.
We actually have a similar project sitting behind the shop at work, a '54 GMC on a Yukon frame. I'll see about snapping a few shots at lunch.