I spoke to someone at AQMD about the CARB issue -- where they agreed not to approve E85 conversions.
The logic is: When E85 was being introduced, OEMs started using parts designed for the fuel, but they phased the parts in, so some models have parts that are, and aren't E85 safe because they didn't need to be at the time of manufacture. As E85 continued, all OEM replacement parts were E85-rated which is why the catalogs quote the same part numbers.
Also, for vehicles that were unofficially E85-safe when they were made, but are old enough to be out of warranty, it cannot be assumed their fuel systems have not been repaired by a non-dealer using non-OEM parts or parts rebuilt with non-E85 components. Many after-market parts are designed on the originals and look the same but were not E85-safe, so even careful inspection can lead to missed non-OEM parts.
Used vehicles may have been so repaired without the current owner's knowledge, and E85 conversion may be unsafe as a result.
They err on the side of safety. If just one or two older vehicles are converted and their fuel systems fail, it would give alternative fuel use a black mark and hinder the effort.
So, there it is. Take it for what it's worth.
At the L.A. Auto Show, I did see an "HH2" system that has CARB certification, so they do approve something. Maybe this one is easier to approve because it doesn't really alter the fuel system, just adds hydrogen to the air intake as a combustion enhancer.
