Well guys I just bought a spare rear end housing from a salvage yard.It's out of a 09 challenger--it has the three bolt pinion flange like MY housing. I decided not to spin the wheel of luck with a housing from a charger,300,or magnum and find out something isn't the same. I will be working on it to put the 3.55 gears in--then I'll have the option to run 3.06 or 3.55 by simply changing carriers.