Glenn also has his truck in the Gallery with an email pick. He also contributes to this forum from time to time and has(d) a profile you can view and access his contact info. He and I have exchanged emails about this topic and he is a very knowledgable and helpful man. I also found a great online article about an LPG only conversion that will probably have some useful info
here . I hope this helps you. Good Luck! :p