Search on here for all of the soa stuff, John Nutter's articles are perfect. As a matter of fact, that's the combination he was running wag/scout. You'll find out that it may actually cost a bit more to do it correctly, but will be well worth it. On the plus side your springs will be cheaper because you'll be looking for stock yj springs $50-100 for the set. On the negative side you'll need to definitely account for a rear cv shaft, which you may not have needed for your 4". Plus you'll need a rear anti-wrap bar (which you could fab yourself). And, since you're going with a wag front, find a flat top, and then add in the cost of doing a hi-steer conversion.