Really no need for a 4 link if you're just having fun. The fastest mopars on the track have been, and continue to be, torsion bar/leaf spring cars. With the same driver on the same course the Hotchkis Taxi put down better times than a 2012 3 series BMW. And that was TireRack's professional driver, who usually does his testing with the 3 series BMW and not a 4 door 1970 Satellite with torsion bars and leaf springs.
The Hotchkis TVR system has some cool stuff, but, it's also still missing a whole bunch of things you need. Like torsion bars and shocks. It's also got a few things that you can save some money on, like their steering rod kit that you don't need. And some stuff I personally don't like on street cars, namely, the heim joints on the UCA's. But that's just me and I daily drive my car in all weather conditions so I have a different perspective on some of that stuff.
This is the set up I run on my Duster and what it cost. It handles pretty darn well. As well as my '04 SRT4 ever did, and it had stage III mopar coilovers and big sway bars too.
Front:
1.12" torsion bars from Firm Feel: $355
Bergman Autocraft SPC UCA's:$395
Howe Racing upper ball joints: $130
Moog lower ball joints:$80
QA1 LCA's: $395
Hotchkis Shocks (non adjustable): $475
Hellwig 55905 front bar: $175
Flaming River 16:1 steering box: $610
QA1 tie rod sleeves: $50
Moog tie rods (all): $60
Moog pitman and idler arms: $80
Adjustable PST strut rods:$300
Rear:
Hellwig 6908 rear bar: $180 (this is the Ebody bar I run with my B-body rear axle)
AFCO 20231M springs: $320
AFCO leaf spring sliders: $200
Dr. Diff 1/2" spring offset:$150
Leaf spring perches: $15
Front suspension: 3,105
Rear suspension: 865
Total: $3,970
Some of that stuff you don't need, like the QA1 LCA's and the leaf spring sliders. Which right off the bat takes knocks the price down almost $600. And everything is there, full rebuild on all the bushings, tie rod ends, etc. If you drop the LCA's and sliders you do need to add LCA bushings and shackle bushings, but those are cheap. The TVR leaves out some important stuff that will add cost (lots of it!). This is obviously my list, you may not need or want everything there and there are some places to save money from what I got. The 5.7 swap changes some things, although I know there are headers out there now for doing that swap with torsion bars. A coilover front end would give you some more room there so it has some advantages with the engine swap, but from a handling standpoint its not necessary to handle well.