Hi George and
Sorry, but your post is kind of hard to follow. Are you saying you
want it to downshift going over freeway overpasses? Most of us
don't want the tranny downshifting at every little hill.
The V10 is designed with a very wide RPM operating range and with all the modifications you've done it should be putting out substantial power so I'm surprised that you are still looking for more hill-pulling power. If it is mainly a problem that it won't downshift when you need it to, you should contact 5-Star to see if they can adjust the shift points in the tuner. Maybe that is all you need.
If not, then maybe you need a 400HP diesel pusher.