Do a search in 'road cycling' forum. I asked the same question there a few months back and got some numbers on NC Drive and, some info on mapping sites.
Try Laguna Canyon Road out of L.Beach yet? Not a hurting climb, just long and steady.
Newp Coast Drive w. the Ridge climb on the end is best appreciated at the end of a 40+m. ride, on Saturday a.m., in the rising heat, with about 75 other group riders blasting their way up. Not too long (1.8 w/o Ridge) but it's got enough bite for me when I'm drained out.
Enjoy.