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to further answer your question Dabbas, yes dana 60 and a 14 bolt are the way to go , and yes you will need to have the same ratio front and rear or else one end will be trying to turn at one speed and the other will try to turn at a different speed and most likely something will go BOOM
Just in case you meant to ask if the gear ratio had to be the same as your old axles , then the answer is no, you can run what ever gear suits your needs