You will defentally get mixed results about whether it works or not.
But, from I have seen, it seems like the people that say it won't work, haven't tried, but the people that have tried it, say it does work. (That is not just here on TRS but alot of other sites as well.
I will be trying it once school gets out at the end of this week. I got a '84 2.8L Ranger (last week) that me and one of my friends are going to try this on.
If I were you, I'd do a google search, and even a Youtube search for things like HHO, HHO injection, Hydrogen booster, run your car on water, things like that, and you will find all the info you could want with enough searching.