The same as John Force won with a mustang. Sorry, but if you are removing core things of a '15 mustang, that is not a '15 mustang anymore.
What happens when anyone else puts an auto tranny in their originally manual car? Are their 1/4 mile times less meaningful then too? What about when they swap the stock 8.8" rear end for a Strange 9"? Or how about a lightweight front k-member? Well, I guess it's core is gone, it's not a Mustang anymore.
I'm not at all being argumentative here, just posing the questions.
To go fast, you have to change parts. Plain and simple. There was nothing easy about building this car as it sits now- it certainly wasn't the 'easier' route to take, to go this fast... but was what we felt to be the best & safest route. Keep in mind MOST of the work done to this car was done for SEMA
last year, when hardly anything existed for it. Couldn't tune the car then. Couldn't get down the track without breaking axles then. It still has a '15 block in it. It's still an all-metal '15 body (except hood), with damn near a full interior (no back seat because of cage). It's still 100% street legal, titled, and registered.
Want to see what a '15 can do with stock '15 motor, trans, and rear end? Already been done from what I can tell, and they're all stuck in the mid-9's. Want to run faster? Then stuff has to be changed. Would you feel comfortable with an MT82 behind a 1000+hp motor? How about the stock IRS axles w/ a 1000hp motor?
I should note- we did not build the car solely for the purpose of claiming records- records come and go, and I'm certain someone else will be faster one of these days. We wanted the car to be fast... so we can ALSO test and validate the parts we make for this chassis. Not much credibility for a lightweight front end or fully built 9" rear IRS if you're only running high-9s or 10s, right?
Building a car like this and pushing the envelope is what this hobby is about. Sharing the knowledge learned from going this far with a car is what makes everyone smarter... and faster. If we all sat around and were complacent with stock components, no one would be going as fast as they are today.