Having just gone through it myself, I will say that there is a reluctance to authorize a blanket over the clutch housing on the part of the officials. The only reason my drive got the thumbs up - and it took a long time for the decision to be made - is because of the small clutch size and the forged flywheel.
Given that you've stretched your chassis, the Aussie's idea will probably work well for you, AND put some additional weight right about where you'll want it. Just make sure you allow plenty of time for approval - the tech guys do get swamped with requests, they're volunteers with lives outside of LSR, and patient, friendly persistence will tend to pay off.