front control arms the same on a 1500 /2500?

[86454k30]

8lug control arms will NOT fit 6 lug trucks. They are wider at the frame mounting location. The only option you have if you want to keep it lifted that high is to purchase a 2-3" kit from rough country. Their kit provides a new upper control arm to "fix" the problem you are having. I have also heard that you can "flip" the upper ball joint from top to bottom to gain a little more clearance.