[cobrakiwi]

Hi
I had the same problem on a build, (the blocks need to be tight). I had to take both blocks off the car and assemble them on the bench and ream them to fit the sway bar. When I assembled them back on the car I put some grease where the bar contacts the blocks, no more problems. If your bar is powder coated it could be the thickness of the coating causing the problem, if so you could try and remove the powder coating right where it contacts the blocks.