Non A-body mopar question

Is what rear end in the car going to make or break you buying the car? Sure the 7 1/4 is the weakest of the three rear ends mentioned in this thread so far. And yeah peeps love to chime in saying how their 7 1/4 didn’t last long. Who knows how long that 7 1/4 has been in the car? If it rolled off the assembly line with it then it’s lasted 57 years already! Prolly good for another few years. Maybe it was put in 45 years ago? No one here can definitively say what came in that car nor claim when/how that rear end will crater.