I don't know anything about Johnny Law stuff...
Look OK to me...
Mustang II stuff is a big part of the industry today too,
many people use that stuff & have great experiences too...
All my ol' GM stuff was either converted to Lamb Struts
or Mustang II stuff...
Pretty much industry std. today...
Also look at QA1 extremely affordable
& you can do one part at a time if need be
you can keep Torsion bars or go to Coil-overs...
I've done it both ways coil over or torsion bars...
I've actually had several cars with Capps Automotive
{org. Mopar Tubular suspension}& now owned by QA1 for their stuff...
I'm very happy/satisfied, great quality & superior handling over OE style stamped steel flexy flyer, with a sever push & under-steer type suspension
has it's limits & the bonus is Tubular stuff it's, lighter, stronger,
you can actually use coil-overs, if you chose to do so,
beef up the shock towers etc.,
you can do then with rear-steer OE style Moapr stuff,
or converted to front-steer, by flip flopping the lower ball joints forward
left side on the right & visa versa
you can get them with poly or rubber bushed even,
factory style Torsion bars can be used,
you can get them with factory style sway bar mounts too &
also all they're very affordable...
Ride-Tech {coil-over or air ride} is another choice many pro-touring guys
love/rave about the stuff...
Amongst many other brands;
PST is supposed to be great & quality too,
I haven't had any complete upgrades from them yet...
Magnumforce is great, a tad bit pricey but quality
Reilly Motorsports is great too, a tad bit on the pricey side also, but quality...
Gerst look great, I haven't used them "yet" &
we have a couple members that have used them too...
The OE Mopar stuff can be made to work far better too,
enough time & effort cleaning welding bracing etc.
Larger torsion bars & larger sway-bars front & rear
some good quality gas shocks & better wider tires
lighter rims, less reciprocating weight, less sprung weight,
better brakes {S/S Teflon lined brake lines}all, at a min.
will do wonders, for feel & handling...
Get it a little lower will help a lot too...
More than one way to skin a cat...
Too each their own...
Build your car how you want it, don't be detoured...
Just do your research/due diligence...