Are suspension parts differernt for a V-8 K frame and the slant 6 K frame?

It's hard really hard to say what it was like before. I only had the car with the slant 6 for about 6 months. It just feels like whenever I get into the freeway it wants to keep going in that direction off the road. Then I have to be careful because when try to straighten it to get back into the lane it will just want to keep going in that direction. Its crazy.

So, yea... I avoid the freeway. Around town its ok though.