i want to buy a 9" 3.73 and im lookin at some of the sponsors listings and when it gets to the section of whats offered it has a list of other stuff which i am ignorant and do not understand all the parts involved yet....so my question is where can i find a 3.73 9" 30+ spline complete setup for sale.....and also ive heard they are not directly bolt on like the 12 bolts so whats different with the way theyr installed....i want to try and do it myslef so i can learn more but if its something thta an experienced person should be doing then ill pay the extra for good work....ty

 

I would say have a professional install your 9"
the 12 bolts are more of a bolt in. Look around your area and find a shop with experience in doing this.