Love mine....honestly best mod I have done. First time I drove it after the install, I wasn't moving and couldn't figure it out. I looked behind me and there was smoke from the tires spinning, where I wasn't used to them spinning with the same amount of throttle applied. The mechanic laughed his butt off due to my expression!
We obviously don't have a lot of data for our trucks with a converter. However, L guys have been seeing .5 secs off their 1/4 mile time. Heck, search the internet for any vehicle with an upgraded converter.
You are shifting your HP/torque curve to the left by getting up in the RPMs quicker. More power to launch with at a dead stop or slow roll. Con: is you may burn more gas around town, not too much.
I put a 2800 stall on my Hemi truck too. Absolutely different vehicle with it.