And don't forget K&B. Gary Conley and K&B worked on this in the mid '80s but K&B pulled the plug and sort of left Gary hanging. Gary tried marketing them but they never caught on. He eventually sold the rights to a company in Minnesota that renamed the engine Abitar. They couldn't give the things away, which is rather ironic because they've become rather collectable. Don't know if it's worth $750 though.