stance is perfect on my 66 with 002 &003 springs and 6cyl torsion bars up front. It took a couple of months for them to settle down. And they work great at the track!
I did the same on my '67, put 002/003's on and cranked my OG 6cyl bars a little to give it the right rake and I love the look myself. They ride fine on the street (IMHO). Hook up MUCH better than my old 6 cyl leafs did too even with my old crap shocks, no snubber and less than meaty 235/60/14 cheapo radials. In retrospect I may agree with Adam that Espo's or Mono's or even XHD's may have been a better choice for 90% street driving...but I didnt research much before I bought so they are fine with me.