Yep that is it, let me know!
I've done all those things. At this point I'd just get better tires for rainy weather because when it's wet BFG T/A's remind me of my water skiing days.Disc brakes, and absolutely any frequently driven Mustang should have the Arning drop. I would also add a 1" front sway bar and export brace.
most of the modifications that people make in the name of dependability or daily driving suitability just end up turning a nice simple and easy to work on car into something unnecessarily more complicated.
I think the Achilles Heel is that people are leaving old parts on that are prone to fail due to age and wear rather than using new parts or using lower quality parts as part of the refresh/restoration. Mine was a daily from 67 until the late 90s then a well used pleasure/retiree car until it was parked. The recurring issues I’ve had are due to a 35 year old replacement carb that’s been rebuilt and some 53 year old wiring that was brittle to the touch. It cracked when you handled it exposing the copper. The cam on my distributor is near rounded so the 53 year old distributor will have to be replaced. My overheating issue was old radiator, bad thermostat and 53 years of built up grunge in the block. The theme here is old, worn parts. Just like me...Well that depends. They were daily driver's when they came out over 50 years ago