I have a 67 Fury & you're never going to make it handle well & your'e also destroying a survivor car it sounds like. Get yourself a Duster or Dart or something lighter. I also have a 22 Challenger & while it handles well for what is it it has the same drawback HEAVY - it will never "carve corners"....
When the '67 C-bodies were new, the term "carving corners" was not in general use, IIRC. "Handle Well" certainly applied to any Chrysler product when compared with similar GM and especially Ford products, as to turn-in response and understeer. Until Chevy got their F41 front/reare sway bar option on the Impalas in 1969, with Pontiac being in that same general timeframe on GTOs.
Additionally, the "Handel Well" is more highly variable depending upon what the driver wants, so that is not a generic term of sorts. Soft ride, firm ride, stiff ride, ease of steering effort or "firm feel" effort, "responsive steering" meaning more than just the car changing directions when the steering wheel is turned, too.
In a 1970s definition of "corner carving", the bulk of "front sway bar only" Chrysler products would do that activity better than similar Ford and GM vehicles. Add 2psi more front tire pressure and things would get better. Yet MOST C-body drivers would never get anywhere close to the limits of their cars and tires capabilities, slowing down when "tire noise" started.
Can they do better? Certainly! Modern electric-assist power steering would be one change. Plus a steering gear that is easier to "reverse", too. Meaning it can go from being turned one direction and then not resist quick turning to the other direction, and back again. Figure out a way to mount the front sway bar behind the mid-sump oil pan but in front of the steering linkage would be a good plus, too. Then a rear bar to help balance things out. Add some modern 17" BFG Comp TA rubber into the mix. Yep, one size is an almost perfect OD match for the H78-14 tires of old, while still putting more rubber on the road, as to tread width.
The issue of "weight" will always be an issue when transient maneuvers are executed. Which is where suspension geometry (something else Chrysler products are usually good in, compared to other brands, as to camber angles, lateral roll stiffness, and good grip come into play. Keeping the car flatter and gripping well in such situations. AND then setting it up to have an athletic feel to the whole thing. It has to FEEL like it's having fun, too! Kind of like getting out of a K-car chassis into an LH car chassis vehicle, for example.
The first LX cars might have had Mercedes-origin underpinnings and had great handling dynamics, but the first 300s I drove had none of the prior LH cars' athletic/enjoyable driving feel. Numbed-down, to me. Which got changed when the later cars (after Sergio came on-board) got that athletic feel back.
Just some thoughts and observations,
CBODY67
