(Professor @ Apr. 10 2007,10:06) I'm running the Brocks ultra mod, the clutch stack height at 1.99 inches, Brocks spacers the come with the mod (.180 inch) 4 stock springs and 4 Barnett yellow springs. You’ll want to beef up the sprocket cover, with either a billet cover or a support. From everything I could find, I didn’t see where Brocks cushion kit was that much better than the factory revision pieces that the 02-current versions have.