OK, got the 100 mile road test in.
I like it.
The trans shifts smoother.
The shifts seemed be be a shorter throw. They are much crisper too. Don't get the clunk that LtBawb use to always point out to me.
The rpm drop at 70 is somewhere between 300-400 rpm. Too hard to tell with our very accurate gauges.
As I mentioned previously, the advantage with the DD6 is the ability to lower the overall gear ratio with a simple sprocket and chain replacement. A big plus should I decide to get a trailer or just decide I would rather have more low end torque.
During this change the inner primary got real shiny and I replaced the HD main shaft bearing with the highly recommended Baker bearing. I also used Baker's main race spacer.
I adjusted the speedo with a Dakota Digital module
http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=238/category_id=115/home_id=115/mode=prod/prd238.htmVery easy to setup and use.