Worth checking for sure, but I seriously doubt you have any problems with brakes fitting.
The wheel you're looking for is probably an Accuride part number 29015 (or similar) found on page 28
of this catalog A 19.5x6" rim with a 5" offset, so center of rim out to the mounting surface is 5". and the ID of a plain 19.5" rim is in the neighborhood of 16.5"
Grigg