When I want it to be a manual, I just shift it myself. When I don't, I put it in drive, and forget about it. Cant do that with a manual. It leaves me with on foot on the gas, one on the brake, one hand on the steering, and the other on the shifter. I am sure I wouldn't set up my car for heel and toe shifting, and I don't have an extra leg for the clutch. Automatics are supposed to be more consistent at the drag strip.
4 or 5 years ago, BMW was trying to quit offering manual transmissions in all of their car line, because the auto trans became so much better performing than a manual. Outrage from their supporters prompted them to continue with the manual, otherwise it would have been gone.
One description I got of the Keisler from someone who has driven one in a mopar was that in slow cruising, you can't even feel the trans shift, it is supposed to be that smooth. Kick down works smoothly and easily too. But when you flip the switch, it becomes as hard shifting as you want.
If there was a mopar alternative that works like the Keisler kit, and I don't have to cut the floors, fabricate my own crossmember, and finish the "kit", I would buy it.
Can a 518 handle 600ft lbs?