Ummmm, since I am not a guy and my intention was to clarify the issue with the reflashing, I will assume you are not directing that comment @ me ~D~.
I would say that the statistically speaking the prevailing sentiment was not helpful. I believe 3 folks responded it was not smart and unnecessary to try to achieve what he is asking.
When I skimmed the "Nick Hogan" comment I nodded my head with approval.
I would rate this thread an 8 out of 10 on a "try to divert a life altering catastrophe due to a lack of respect and knowledge of the vehicle driven" scale.
Unfortunately, even at low speeds, individuals who do not have years of driving experience and have no respect for the capability of these RWD cars can still injure or kill themselves and others.
My only advice to the original poster is instead of trying to bump up the power and speed of the Stang, try to locate high performance education events/schools (HPDE/HPDS) in your area to attend. Ask for them as gifts (they run about $175 - $250 depending on the event), because one day they may save your life and in the short run they will get that "have to go real fast" attitude ground down a bit.