You're going to need a little energon and a lot of luck.
You are gambling on a lot of things that often fail working perfectly.
* Flight being on time
* Custom/immigrations going smoothly
* Baggage claim being quick
* The booked taxi being there
* LA rush hour traffic (some of the slowest in the world)
Might I suggest you contact them and let them know there's a chance you might not make it (due to traffic) and that if you can't you nominate Griffin to go in your place?