The knock-off adaptors are easy to get, and it’s not much to have a machine shop drill and tap the 4 x 4.5-inch pattern. I used bolts screwed from the inside of the drums and rotors to mount. All straightforward.
But the wheels widen the track by an inch at every corner.

On the front you can fix that with a narrowed beam. In back you’re talking narrowed trailing arms, which are money, time and trouble to get and install.
So what I did, I sectioned the fenders and widened the body. This was not a quick or easy operation. Hence, my advice.
