I plan to do the exhaust and F6 airbox and then when I get more funds do the edit, so that way im not going back and forth, that's the plan anyhow. and id like to do the injectors at the same time as the tune, id like to make sure that I dont hurt the motor at all. thanx for the feed back on the auto, ill have a hunt for info bout the 4spd, I had one built for my 347 stroker in my old EF and was pretty happy with that, but it had less power than what the XR will put out, but on the other hand the power in the 347 was alot different and like what what said earlier the way it shifts will make a big difference, nothing to harsh but faster than the stock shift.