i dont know if i should build my 9.25 of a dana 60 for my 500hp truck(4400lbs) i am conserned about weight how muck more does the dana 60 weight compared to the 9.25 and to you think that if i put a high quality locker 3.92 ratio and chromoly shafts will that hold up to the 440 big block or should i sacrafice weight and go with a dana 60