I'm doing the "Disc o Tech" disc brake swap on my 67 coronet. I've got everything I need (those spindles and caliper adapters DO NOT grow on tree's by the way). I've got it all, except, the brake shields. I've got them for the 10.75 rotors but not the 11.75. What do you think? Run the 10.75's? Don't run them at all? What do they do? Keep balljoint grease off the rotors?

Thanks.