http://talk.collegeconfidential.com/what-my-chances/1903428-faq-uc-historical-frosh-admit-rates-by-hs-gpa.html shows you past admit rates by GPA. With your 4.0 unweighted with lots of AP courses, you GPA for UC purposes is as good as it can be, and UCs really emphasize GPA (over test scores). However, UCB and UCLA are so competitive that even in the top GPA range (4.20 and higher), only 46% and 53% of applicants were admitted in 2015. Also, engineering majors tend to be more competitive than the school overall. You may want to add additional UCs as less reachy options.