Problem is. With reversion, you won't be getting a good AFR so autotune doesn't work all that well....
This is where a chassis dyno shines. as I can manually adjust the values and see what it takes to pick up power at that rpm, load and throttle position, You tune it in regardless of what the afr says.
All you do is lock the throttle at that specific point (which is usually about 10% throttle and 2500-3500 rpm) and gun It to that specific point and dyno to achieve the highest HP (which is about 18-23 rwhp at that throttle position). manually change the values about 5 points at a time until you see what directin you have to go to clear it up. and get it set where the power is the highest at that throttle position.
Autotune is great, but like I said...It doesn't always work like it says it does.
now, you'll have to spend more on pipes, 02 bungs, time to install, and retune, when that motor can actually be tuned in with exactly what you have on it....If you had a dyno and knew how to use it. I could have it tuned in under 2 hours doing it my way manually....You'll spend 3-4 days trying it their way and it still might not be 100%
John