Found this on Craigslist today for $500, right now I have d30 front and d35 rear. I was planning on just getting a superior 35 kit, but I just seen this. It is geared to 4:56 already, and so is my d30 and d35. Would this be a better route than getting the superior 35 kit? It says all it needs is the brackets and it is ready to install.