I don't have "much." In the 80's I worked for a small HVAC/R company who had 3 service vehicles with dual fuel, 2 of them 318 Dodge vans. LP does not get as good mileage as gasoline, and believe it or not may not give very good cold weather performance. And it doesn't deliver the power gasoline does. I might ask "why do you want this?" The "big advantage" to LP seemed to be cleaner engine guts, at the time. With modern EFI I'm not sure that advantage exists, or at least "is as great."
