Ride quality even worse than expected. Advice welcome.

I have been focusing on handling parts for my Dart. This virtually always means a serious ride penalty but that roughness can also improve the sense of connection with the car in addition to better handling manners and predictable limits. I have done complete suspension setups in several cars (late model Mustangs, Miatas) so I was pretty well prepared for some "harshness" but this just doesn't quite feel right.

I'm wondering if my setup is just suffering from being too low (lacking travel) or of something else is going on but the car basically rides like crap. It bangs and shudders over bumps and feels just jittery but still lacking any sense of satisfying feedback.

I have chassis reinforcements still sitting in a box, waiting to go in the car (torque boxes and subframe connectors) so I haven't even dreamed of pushing it through any corners yet but nothing about the driving characteristics inspires confidence.

QA1 Upper and lower control arms
QA1 Dynamic adjustable strut rods
1.14" Torsion bars
Mancini camber spacers (may remove if not needed)
Hotchkis/Fox shocks (non-adjustable)
Helwig front sway bar
16:1 manual steering box
Fresh ball joints
Hotchkis rear lowering leaf springs
1.5" lowering blocks
relatively light aluminum wheels
225/60/15 front, 255/60/15 rear tires (poor performance tires but they should only help the ride quality, no?)

Anything inherently wrong with that combo?
Looking at the car, it doesn't strike me as being extremely low...

(Yes, I know the hood is still crooked...It still working on that. I just got impatient and wanted to go for a drive :D)

5-18-19 Dart.jpg