I have recently started to plan out what to do next with my ‘73 Duster. I plan to install an Edelbrock Pro Flo 4 fuel injection system and rebuild the 904 that came with the Duster. I plan on getting a more heavy duty rear end, but want to keep the 5x4 bolt pattern that it currently has. Is this possible? And what would be the easiest way to go about doing this? Any help is appreciated.