You still need to get an alignment. Changing the geometry is irrelevant compared to loosening suspension fasteners and replacing major suspension components. While the car may track straight you could be damaging your tires right now.
I'm guessing you didn't read the post?
" I checked the alignment and it had not changed from stock
- no reason for it to, since I did not lower the car and change the suspension geometry.
A performance shop in our area did the modification work. They put the car on their alignment system after the work and the alignment was well within the stock specifications. They made no adjustments. Checking the alignment, after working on the suspension, is a very good idea.
2013 Mustang GT Premium Convertible
Candy Apple Red, Auto, FRPP Tune, GT500 Axlebacks, KONI Yellow Sport (adjustable dampers), FRPP Front and Rear swaybars, Custom Removable 4 Point Roll-Bar, BOSS 302 Low Expansion Brake Lines, Roush side splitters, GT500 spoiler, Redline Tuning hood struts,18" Ford Chromed Aluminum Wheels (9R3Z-1K007-A), Michelin Pilot Super Sports - 235X50X18
2011 Mustang V6 Premium Convertible - Gone