I had Jimmy's rod and custom in Daytona, FL do the work. Jimmy has tubbed a bazillion vehicles before and narrowed a ton of rear ends so it was work as usual for him to do a great job. He stated that the centering pins on the SS Mopar spings are already a tad bit further to the rear than the stock springs. You should be able to fine tune the location of the rear end with where the front box mounting point is. The further back, the further back the centering pin is. He is an excellent chassis man and he measures EVERYTHING.
