Cool, I am looking at an engine swap sometime in the next 18 months on my 5.3L gas on my Silverado. Since Duralurb does not have a website yet; Do you have something you can send me with all the changes that are done? in the case of a 1500 up convert? (Engine, Transmission, etc) can still use the stock rear diff or do I need other things upgraded as well? And what the approximate cost would be (roughly).