[marfen]

What they're using and what you need with the lightweight motor you're going to run . with a hemi/big block if you use the mopar performance race t bars your car will settle down low into the weeds eventually no matter how tight you twist them-they're that light. Stock the 68SS cars used the heavy 383 bars so you could set the height where you want it and it stays there. I wouldn't worry too much about them, build your car and see how the bars you already have work and go from there.