Re: WK straight axle???
Hmmmm, seriously, I would just look elsewhere. I'd build a seriously awesome long wheelbase Wrangler with a 6.1 conversion before attempting a live (solid) front axle conversion on a WK. There is just WAY too many issues to wwork through, and not all are obvious. Heck, even getting the correct geometry so the thing steered and stopped safely would be a serious engineering challenge.
Most people think it's a matter of welding in some mounts and bolting it in, it's just not. Don't do it.