Choosing Oct. 30 as an arbitrary date, the sun rises in LA at 7:11 am, and sets in Monterey at 6:13 p.m. So you will have 11 hours of daylight. It would vary by only a few minutes either way depending on your actual date.
Assuming you left LA at 7 am, arrived at Solvang 9:30, left Solvang at 10:15, arrived San Simeon at 12:15, bought your ticket, took the 30-minute bus ride up to Hearst Castle, the 1-hour tour, the 30-minute ride back down, you would be leaving Hearst Castle at 2:15 at the earliest. You should also stop to get gas somewhere. So make that 2:30 the earliest you could start the Big Sur drive.
And the sun will set approximately 6:13. So you have about 3 hours 45 minutes if you want to complete all this without driving in the dark. It's 95 miles from San Simeon to Monterey, about 2 hours of driving plus time spent at stops. So that gives you about 1 hour and 45 minutes of time for stops between San Simeon and Monterey.
I would recommend stopping briefly at Julia Pfeiffer Burns State Park, to take the short trail to the platform where you can view the cove with the waterfall that lands on the beach. That stop will take only 15 to 20 minutes. You may want to make a short stop at Hurricane Point for the view, and you will undoubtedly be making unplanned stops at some other turnouts. Figure 30 minutes for all those quick turnout stops.
That leaves you about 1 hour left and I think you should spend that at Point Lobos State Natural Reserve, which is near the end of the drive just before Carmel. It closes 30 minutes after sunset so you can stay there until the sun goes down, then you will have a short drive to Monterey in the dark, but an easy drive. Walk the Cypress Grove Trail at Point Lobos, see China Cove at the south end, go to the open, rocky, Sea Lion Point for the sunset. Your day use parking fee ($10) from Julia Pfeiffer Burns State Park is also good for Point Lobos on the same day. So just show your receipt at the gate.
Guides to the Big Sur area are at http://jrabold.net/bigsur/ and http://bigsurcalifornia.org
Another member of this forum took a trip through that region and posted an extensive gallery of photos with descriptive captions at https://picasaweb.google.com/Mjneenan/Califo…