Recommendations on what to do while on holidays in U.S

[*rayman*]

We are heading over to the U.S from Australia in a couple of days, looking for some tips on some additional things to do while we are there.

Our travel plan is:
- New York 7 nights (including 4th July)
- Fly to San Fransisco (2 nights)
- Drive from San Fran to Vegas (night stoppover in Yosemite park)
- Las Vegas (3-4 nights)
- Drive from Vegas to LA, stay Huntington beach (2 nights)
- Day trip down to San Diego for Seaworld
- Stay in Sunset blvd in LA (3 nights)
- Fly out from LA

We are going to visit the following car shops: Foose Designs, Barry White Speed Shop, West Coast Customs, SoCal customs (vegas), Matts Classic Bowties, Classic industries, maybe the Edelbrock shop.

Are there any decent Auto recyclers in our vicinity's that are likely to have any first gen camaro stuff? What about street meets/test and tune nights, car shows?

If any of you have any recommendations of must see things in these places i've mentioned, i'll add it to our itinery if we don't already have it.