What I learned 1st season
This stuff is old hat to the experienced racer but thought I would share what I learned in my first year.
The Mustang is a great car right out the door and if you are serious about 1/4 the very first thing you should do is invest in drag tires your call on what type. If you start adding power without taking care of traction things will get worse not better believe I learned this the hard way.
If you drive a 6 speed and I think this is by far the most fun at the track, then I would invest in a short shifter - not sure how the 15 will be but it made a huge difference in my 13 - no missed shifts and a lot quicker.
Along with the tires makes some changes to suspension, the stock is very flexiable -
Then to the power mods - depends on budget and how fast yoou want to go - I have seen 6 speed mustangs with just the above mods done turn mid 12 with ease.
Last talk to other racers, they are always willing to help - Taska racing was a great help to me as well as guys I met at the track
Do not expect too much too early - The left foot right foot driver Mod is key especailly with a 6 speed.
For us in the Northeast it will be a long winter - Maybe take up ice racing LOL
2013 GT/CS lots of Mods and will be running Hoosier Quick Time Pro Bias Plys 27 10 15 next spring