In order to keep the consistency of the outside the Stang got the front Cobra seats, dash (with white gauges coming from a real Cobra) a Pro-5 shifter and aluminum shift know as well as a set of aluminum and carbon pedals.
A set of three points harnesses helps to maintain the passengers in positions (hard cornering required!!) I also added a oil temp gauge on the A-pillar.

Things get better with the sound system:
Alpine 7940 CD head unit, ERAG-320 digital EQ, and an Alpine MP3 6 disk changer. The front speakers (Boston Pro crossover and 4 tweeter and Kicker competition 6.5') as well as the rears (JBL 3 ways and Polk tweeters) are powered by and Alpine 4 channel V12 expert series. The truck is filled with a custom sub box with 2 12" Boston Pro (they are absolutely insane... don't buy these unless you wanna become deaf..or if you wanna show of!). These are fed by an Alpine MRV 1002 amp. The system include circuit breaker, and Monster cable (everywhere).