Thanks for the link Gerry. That "style" is still common and basically one of the designs I was considering.
I do have a Model A Ford axle and I was thinking of coming up with a humped grader blade that I could also switch out to my York Rake or the grader blade, with it suspended between the tractor and the axle.
I think I'm typing that right.. LOL.. ANyway, the extra distance provided by the trailer wheels being at the very back "should" take out a bunch of pitch and roll. In my mind it does anyway!