I am planning to upgrade my camping trailer to something substantially larger than my current 18 footer. Most likely 28 to 32 feet and around 9000 pounds. So, the question is, should I upgrade the drivetrain in my 72 Blazer? The engine is already plenty powerful with the GMPP 383HT, but I worry about the TH350 and the stock axles. I already have a class IV hitch and am wired for brakes, etc. I don't wheel that hard, but there are some substantial grades on the way to hunting and in it is mostly uphill all the way there. At a minimum I would think I need better brakes, even with trailer brakes. My goal is make the Blazer safe and capable for this application. Your recommendations are appreciated.