Best Aftermarket Suspension Set-up

Here's what I paid for my front suspension, adjusted for todays prices. This mirrors 72bluNblu's with a few differences.

​

PST 1.03" torsion bar: $299
1.03" Torsion Bar - A Body
Proforged LWR ball joint (driver)- $56.85
1974 PLYMOUTH DUSTER Proforged Chassis Parts 101-10129 Proforged Ball Joints | Summit Racing

Proforged LWR ball joint (passenger)- $56.85
1974 PLYMOUTH DUSTER Proforged Chassis Parts 101-10128 Proforged Ball Joints | Summit Racing

QA1 Stocker star NA shocks: $155.04 ea. total $310.08.
QA1 TN501 QA1 Stocker Star NA Shocks | Summit Racing

QA1 K-member: $820.95
QA1 52313 QA1 Mopar K-Members | Summit Racing

QA1 Upper control arm: $464.95 kit
QA1 52301 QA1 Mopar Control Arms | Summit Racing

QA1 dynamic adjustable strut bars: $304.95 kit
QA1 52311 QA1 Dynamic Adjustable Strut Bars | Summit Racing

QA1 Heavy duty Tie rod sleeves: $89.95 pr.
QA1 52324 QA1 Heavy-Duty Tie Rod Sleeves | Summit Racing

Pro-Forged Tie rod ends:
Proforged Chassis Parts 104-10268 Proforged Tie Rod Ends | Summit Racing $25.82 ea.
Proforged Chassis Parts 104-10289 Proforged Tie Rod Ends | Summit Racing $27.63 ea.
Total: $106.90

*QA1 front sway bar: $290.95 kit
QA1 52861 QA1 Sway Bars | Summit Racing
*For this to work with stock style LCA's you need to use 73+ LCA's with sway bar tab. I got lucky and found a pair off of a 73 Duster parts car that I got for free. I've seen some on Ebay go for about $250 to $350 range per pair.

Stock Lower control arms.
Welded my own reinforcement with steel bars: Material costs approx. $30.00

Pro-thane Control arm bushings:
Prothane Motion Control 4-205-BL Prothane Front Control Arm Bushings | Summit Racing $10.00, Already had new LCA shafts
Otherwise:
Proforged Control arm shaft kit: $124.95
Proforged Chassis Parts 120-10003 Proforged Control Arm Shaft Kits | Summit Racing

Energy suspension bushing kit. (I had an older set that I bought from someone else here awhile back, I didn't use all of it): $198.72
Energy Suspension 5.18104G Energy Suspension Hyperflex Bushing Kits | Summit Racing

Total: About $3041 if you have the stock 73+ LCA with sway bar tabs. Other wise: Approx. $3,440 - $3,560.
Also, I already had front disk brakes, so the spindles were not an issue. This is all for the front suspension, the rear I haven't hardly touched yet.

After all this and got my alignment done (additional $140 cost). The handling and ride significantly improved. The twisties up here in the mountains are so much fun now.
However the limiting factor right now is the stock 50+ yr old rear suspension. I did take her to a makeshift autocross course on an abandoned parking lot at the Deseret Depo (Former US Army National Guard post) and quickly hit the cars limit when I did some very spirited turns. Oof! (some cones were hurt in the process)

I'm currently still using stock manual steering, but will be putting in a Borgeson power steering in soon (I bought a lightly used unit from ebay 3 years ago for $500)

As stated earlier, I have not done anything with the rear yet:
So my next thing to do is replace the leaf springs, bushings and install rear sway-bar while swapping in the 8 3/4 I'm assembling now. Which isn't too bad cost wise.
I do have these that I bought for $275 a pair awhile back: (Mancini Racing Extra Heavy Duty rear leaf springs) now they're $325 a pr.
Mancini Racing Extra Heavy Duty Leaf Spring Set
I do have but not installed a pair of rear bilstein shocks. $252.62 pr.
https://p-s-t.com/i-23160582-rear-bilstein-high-performance-shocks.html but for now I'm currently using old KYB shocks, ugh.
I'm also currently looking at options for rear sway bars.

I've also been looking at this:
QA1 R250-175 QA1 Mopar Rear Coilover Conversion Systems | Summit Racing a $2,484.95 cost. Oof.