gears ?
 

i recently tore the rear pinion out of my truck. i have 3.55 gear in my dana 70. i have a guy i go to church with that is gonna give me a free set of 4.56 gears that cam out of a 90 model dana 60 front and dana 70 rear. my question is, will the 4.56 be to low of a gears for pulling with my setup? im pulling with 35x12.50 tires

how many rpms can you turn? I see the 4k kit but what does it turn down the track

in second, 3200, when i went to 3rd, it held 2500

i think you will be better off.