I'm using a .5" longer mono ball joint on my Chevelle, but we used the Howe .5" longer joint on a buddies Chevelle. Very nice ball joint and it will give you ~.75" extra travel at the wheel. I would use the Howe joint long before a mono joint now that I know about them. Check with
www.scandc.com They will build the joint with the .5" extra long stud so you don't have to buy them seperate.