We'll see how that goes. UCLA had a damn good defense last season. 14th in scoring D and only gave up 4.6 YPP. The run defense held teams to 2.7 YPC and only four teams even managed above that number (Arizona, Cal, Oregon State, Boise State). Only two teams managed above 400 yards against them and they held USC to only 20 points and 5.9 yards per play (their 2nd worse figure).
At least the USC defense couldn't possibly perform worse... 121st in scoring and gave up 6.1 YPP last year. They gave up 4.8 YPC. Pass defense also gave up 31 TDs, a 64% completion percentage allowed, and gave up 7.7 Y/A. He'll be hard pressed to match that level of ineptitude.