The smog test in CA for registration purposes on privately owned diesels isn't bad. They look for the devices that have to be there, in the case of your 7.3 that is the warm up valve on the turbo and maybe a cat. They won't care what you've don't to the exhaust, if the truck didn't come from the factory with a cat you can do anything from turbo back, they won't care if you have a 5" downpipe straight piped into 8" stacks. The air intake has to be stock or have a CARB approval number (most don't for diesels) so best to fly with stock parts, although the Donaldson air intake upgrade seems to fly by because it looks very OEM stock. Pull the chip, and drive it a couple days, several thorough full temperature drive cycles, to make sure it will pass the readiness tests, and that's it for the visual. The actual test is a snap test, they watch te exhaust and rev the engine from idle to 3000rpm, and look for any smoke it produces to dissipate in 3 seconds, you can check this yourself to be sure you'll pass. Always take a fully warmed up vehicle and it never hurts to drive them a little harder than normal a dot or two prior to the test.
To get plates you'll need a signed original weigh slip, they go by thousands of pounds, so take all your junk out of the truck and get it under 8k if you can, under 7k will save you $50+ a year. They do a vin verification right at the DMV.
You are supposed to switch everything over to CA within two weeks, but if you're close, like under a month, you'll be fine.
The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan
7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4
6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
2005 F-350 XLT, CCLB, SRW, 4x4 FX4
6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift