I read it as front higher than rear.
That would be Gasser style, which is actually quite popular at this time. Most, if not all, Gasser style rods are built with a straight axle, though.
Jerry is absolutly correct about the pivot points and frame angle. Frame angle is one of the first measurements I take when aligning a truck, as it affects the entire alignment process.
Other things to consider are the operating angles of the balljoints and tie rods. This goes for lowered and lifted suspensions. Anyone familiar with the late model IFS 4x4s has heard of the balljoint problems with that style suspension when they are lifted. Most of the time, it's due to running them at an angle they were never intended to operate at.
So what you might consider, for the sake of least amount of geometry problems, but still get the look, is to do a combination of lowering the front no more than 2", and do a rubber rake with larger tires in the rear. I would advise against going smaller in the front, you could get into load capacity issues if you go too small.
