All ActivityMost RecentMost LikesSolutionsRe: How many of us are there? Owners of Dodge based RV's? RobinHoodRV wrote: OK, can you explain some of the visual differences? Would really appreciate it! Thanks in advance. Look on the passenger side of the engine block just below the cylinder head and towards the back. You should see IIRC a casting #, casting date, and 440-3.