I have both a drum and disc brake Explorer 8.8's laying around. What's involved in swapping the disc brake set up to the drum brake housing? Is it as easy as removing the drum hardware and backing plate and replacing it with the disc components? Or is there differences in the housing or axle shafts? If I had both of them available to look at and tear down I wouldn't be asking this question, but my disc brake 8.8 is buried in storage.