The only thing that might be an issue is the factory pump tensions the belt by loosening the bolts behind the pulley and then retightening them after you stretch the belt. This one doesn't look like it does that.
Excellent write-up, this should be stickied. I was contemplating the manual seatbelt swap until i found out all the little things to do it correctly. In the end I just replaced the driver side seatbelt track assembly and kept the auto seatbelts.
When I still had the factory thermosensors in my car, the secondary fan would come on a lot later than the primary. I switched it out to another primary sensor and ran a jumper wire between the two for added reassurance.
+1 I have the KSport Kontrol coilovers for my car and they are fantastic. The Legion coilovers are the bottom of the barrel and the main reason you are unhappy with them.
Welcome, beautiful car! Currently there is no new bolt-in strut available for these cars. Some people cut the rear housings and convert them to inserts like the front struts.
Unfortunately, this is the only option now if keeping the factory style mass airflow sensor.
Air intake Adapter Starion/Conquest Cold Filter 1G OEM Mass Flow Meter Adapter | eBay