i am a former emissions inspector, sl county's emissions laws share most with california (sl county's air quality is in the top 3 worst in the nation or at least was years ago when i went to the class)
the sl county health department on vine st. is the place that will need to do yours.
i have a v8 broncoII and a couple years ago when it was time to re-register my v8 bronco II i went through this, they told me the laws were:
1, must be an engine manufactured the same year or newer
2, must have the same miles on engine or less
3, must have been an optional engine for that year,make, model
4, must have all emissions control components as the engine came with (newer engine, newer emission controls)
5, must pass the emissions test as the newer engine.
because as each model year goes on the emissions allowances get tighter and tigher. so if it's a newer engine, with its required controls....it pollutes less, and must conform to standards as if it does pollute less
that being said he told me that he can't say "yeah go ahead, break the law, its ok....." but he did say that if a vehicle has a swap done and it has applicable emissions controls, and not some ridiculous cam shaft in it. and it passes and emissions tailpipe measurement for the vehicle it is in. he'll usually pass it. because the goal is meeting emissions requirements. not telling people which engines they can have.
what steps i have to take in order to do this
i suggest taking it to a regular emissions testing place, and let them run the test, and if it passes you get a certificate, and if it doesn't, maybe because it failed a visual inspection for missing emissions controls, or maybe it failed a probe test. the funny thing is that it isn't technically the responsibilty of the inspector to know the exterior appearance of every engine, but it is his responsibility to visually verify that all components are there,
we would get broncoII's and rangers coming in with 4.0 swaps that i knew were a 4.0, but the sticker under the hood says 2.9l, it had all emissions components, it wasn't up to me to say "hey that's a different engine than a 2.9" as far as the procedure is concerned it is a 2.9.
i also currently have3 friends with bronco IIs that have 4.0 swaps on them that when they get their emissions done every year it is tested as a 2.9, and since the 4.0 is newer it passes better than a 2.9
if you fail he will refer you to the health department, if you pass you get a certificate. either way it is on the inspector at that point not you. and if you have already paid for an emissions test before you go to the health department's testing facility you won't have to pay again.
so it won't hurt to go to a regular testing station first. and go from there
obviously wont pass the original toyota emission standards
is your chev engine newer than your truck is? is it using the correct emissions controls for that engine? if yes to both, it will pass the toyota tailpipe probe test.
the problem is that most people don't swap engines and use all of the emissions controls
i have another friend that has an obdII v8 in his broncoII, they still stuck a probe in his tailpipe but it passes, and has for years. that's why all of these ls1 swaps fly because they are newer engines, and if the swap utilizes the ls1 emission controls it will still put out less pollution than even a 4 cylinder that is from an older model year
