I'm wanting to get a 9" rear end but need some help. This is the gear ratio I'm interested in (or 4.11) Does this look okay? http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1828759282 I have no idea what to look for. What kind of posi is that? (I do know "posi" is a chebby term!) If I get this, what else do I need and how much more will it cost me? Thanks guys.