Extended Forks

[Orpheus]

I recently found some 4" extended fork tubes for my GZ (not a chopper kit, just the forks). Anybody have any experience with anything like this? If I decide to do it, how do you think the response, handling, etc. will be? I've got an overall custom design that I'm planning on working toward with the bike, but I don't want to do anything that will affect the handling in a major way. Thanks for any help you might be able to provide.