One comment. Make sure you follow (or risk it) what the placard says on the drivers door and TT. You can modify your vehicle any way you want to to make yourself comfortable that you can pull it, i.e. change engines, tranny's, axle ratios, tired rating, etc. If by some unlucky day you were pulled over on those portable scale checks (I never have, but have another story) the scalers will open your TV door and look there, they will careless what you did to it. If that ever happened they will make you disconnect and get a vehicle within spec to pull it.
My story; I had a 86' 1500 chevy 305 CI, 4 speed manual, 3.08 gears, c rated tires, springs. Spent a fortune around 18k to upgrade all those limitations; 350 HI Create motor, 3.78, high performance clutch, "e" rated tires, extra leafs. When I went to buy the trailer I wanted and knew I could pull it safely, the dealer looked at the truck and informed they would not let me pull it off the lot with my truck. I told them it was none of their business and repeated my specs, they told me it doesn't matter and for safely they told me I could whatever I wanted once it was off their lot. They also substantiated their concern with what I explained above. I traded for the correct truck.
