i will also add the difference in axles are some have a 3-3/8 or 4 -1/4 diamiter

 

i think i will go with the dana 70 and 80 just cause i know that there good, and my buddie knows them all too well, yeah i got a rack steering system, i was going to go with leaf springs for simplicity and cause i dont mind having a lil more bump going down the road