Built 9\" FF vs. Built 12bolt FF? Well it's time to start deciding on a rear end for my 72 Blazer. I'm trying to decide if I should build up the 12bolt I already have (ie warn kit,lsd,regear,truss,discs) or if I should purchase a built currie 9". The cost of each is going to be pretty close so any input as to the advantages and disadvantages of each are much appreciated. The Blazer is going to be a dune/street machine. I'm a little throttle happy and may get all four wheels in the sky once in a while. I'll be running 35's also. What do you think?