In my quest for better handling, whats next?

So just looking for a little advice from you guys.
What I'm trying to accomplish with the dart is to basically make it feel like a modern car.
Cruising and some occasional spirited driving will be what I do most. May get into some autocross down the road but for now that's it.

My car part money has pretty much run out, but in saving for the next mod, I'm wondering what that should be, or which one should be done first.

Things I want to do in the future are:
Hotchkiss front sway bar
Belstein shocks
Upgrade to 17" wheels and better rubber.

Current setup: 68 Dart
Espo 6 leaf rear springs
PST 1.03 torsion bars
Welded subframe connectors
QA1 upper control arms
New moog idler arm
rest of front end is basically new
Stock type '68 swaybar but with poly mounts and end links.
15x7 rims in back with 225/60/15 TA radials
15x6 rims in front with 205/60/15 TA radials
Current shocks are cheap Monroe gasmatic's