Wondering if the 3500 rear axles on the DRW models are the same as SRW models? Other than getting different rims and a longbox without the dually fender, what would need to be done to make this work? This is on a 2003 3500 dually that I have an opportunity to buy within my family due to the extremely low miles, but not a big fan of the DRW and would like to convert it to SRW sometime.