MuuMuu101's 68 Dart, A Learning Process...

It is good to see you get back to it.
It is a pretty common thing to build the car for performance THEN find it a bit too spartan for comfortable cruising.
I have been there. I'm there right now! I've added a heater and A/C and a few years ago I swapped in a milder cam for better street manners. Driving late model cars changes your tolerance to noises and extreme weather.