I feel that the fuel delivery of just anything more than an EZ (Comp without wire) is a bit aggressive for an un-modified transmission.
Before I had my transmission worked on, I felt the the fuel delivery from only my DDIII injectors was easier on the trans. Pedal travel is important to these transmissions, when you add an EZ or equiv, you get the power with very little pedal travel, this isn't good. With injectors, you get more power later in the pedal, just like a stock truck, but you are also getting more power overall. I'm thinking of running just a fueling box that I can turn on and off, no timing box at all. I like the feel of the truck more without a timing box.
Nate