[Yukon Jack]

My only advice is to find a solid one to begin with and don't worry about whether it is going to be sought after when you're done. If your doing that to enhance the resale, then save your money and don't build one as it is rare that one can sell their truck and make a profit. Build it exactly as you want and be proud of it. My 69 K20 was about as no frill as they come, no power steering or brakes, no radio, 307 engine, you name it, it didn't have it - but, I've built it into something special in my eye and that is all that matters to me.

With that said, I'd probably seek a truck with an AC cab if AC is important to you, everything else you can add yourself.