I called your name, but anyway, converting to e85 is tough because you need to run up to 110 octane or something silly, but you could definately build the compression and combine that with tuning and lots of timing on an old car, I will look into it, yay for ethanol.
Japan's taxis use liquid propane. I could never tell the difference. In fact, they ran a little quieter. When I drove a hotel courtesy shuttle in the US, they used natural gas. I couldn't tell the difference.
In the US, many people think a loud engine is more powerful. If it's quiet, it's got to be wimpy. That's one objection I hear about electric vehicles. No roar means no power. But I've seen some excellent YouTube videos of some very fast cars. I think if they piped in the roar of an engine and made it vary based on the position of the accelerator pedal, put used an electric engine, lots of people would want them. It's a psychological thing.
Honda motorworks in LaCross wisconsin has at least one GX for sale, they only sold them new in Californa, but some of them migrated, the engine on it looks pretty normal, even then injectors look like regulare injectors, only with a differnt fuel rail, and fuel regulator, but for the most part it looked like a normal gas engine, I asked about installing a CNG (compressed natural gas) system in a hybrid for even cleaner running, and they said they never heard of anyone doing that.