Are you sure you want to go with the Moser? Are you going to pay someone else to check the gear set up. If it was me (and it was a month ago) I would go with a Strange. If you are concerned about downtime and want something that can be ordered and shipped with out having to pull your rear end, check with Billingsley Racing. They are a sponsor, and I believe they have everything needed to have Strange build your rear end complete for you so all you have to do is swap your brakes over and go. Granted this will cost you a little more, because I think he will supply the backing plates and reluctor rings for Strange. The reason Strange does this is so they can completely build your rear end, fill it with fluid, and test it. Moser just sends you the pieces. Also check this forum for ???'s about Moser customer service. FYI, I have the Moser 9" housing and Moser axles for my Billingsley street 9", but he went with Strange on the 3rd member (center section, differential, gears and gear set up, etc.).