Initial Maintenance - Ignition Timing, TPS, & Ignition Review

I drove the Mustang to work for the first time today.  As of arriving home this afternoon, I've put 110 miles on it since finishing the interior under a week ago.  

I'm learning a fair amount about the car from driving it.  The largest issues that I'm noticing are:

1) Front Wheel Contact - The front wheels make contact with the lower control arms when turning.  The wider wheels have a negative impact to the turning radius.  It sounds horrible when they make contact with the control arms and I'm sure it is damaging the wheels.  I have some steering limiters that I need to install to fix this problem.

2) Plastic Rattles - The plastic panels in the back of the car rattle significantly.  I hear a few small noises from the front but by far the majority of the noise comes from the back.  

3) Stereo Sound & Age - The radio looks rather dated in the car and the sound of the stereo isn't great.  I have a tough time ignoring it as my early days with cars was as a car audio installer, so I have a hard time letting this stay in its current state.  

4) Clunky Driveline / Suspension - When I back up, I can feel the suspension or driveline have slack in it.  There will be a momentary lack of movement, loose feeling, and then motion.  I expect this is likely related to the rear control arm bushings but it could also be u-joints, rear axle, or perhaps the transmission.  At first it seemed to only impact reverse but the more I drive it, I can feel it in all gear changes.  

After arriving home for the day, I decided to check the ignition timing.  I disconnected the SPOUT connector which appears to have never been touched and is still taped to the rest of the harness.  When I then checked the timing, it was at exactly 8 degrees.  I decided to increase it to 11 degrees as that seems safe despite many running 12 to 14.  If I find this has any negative impact, I can easily change it back.

I then checked the TPS and found it had a solid voltage reading of .81 with the throttle closed.  If this reading is between .75 and .98, then you are within acceptable limits.  I didn't expect to find anything off here as the car is running well but it is worth checking while I'm checking a few things.

I then pulled a spark plug and found the previous owner installed Motorcraft AGSF2C plugs.  That one test plug was properly gapped so I don't feel compelled to check the rest of them.  The spark plug wires are quite nice, thick, and securely connect to the spark plugs.  I then checked the cap and rotor and they are new Ford Motorsport parts too.  I didn't expect to find anything wrong here either but it is one of those things you feel better about once you have put your eyes on it.