8" rears question

[Evil Sid]

I have access to a pair of 8x17" ET52 Porsche Cup II alloys. I would like to fit them to the rear of my late 1303 beetle (planning to lower it 50mm). The questions I have are -
will they fit at all without too much unreversible modification? (I *really* do not want wider fenders/wings)

and if they will fit what is the best brake conversion I should do to the rears so I don't have to run spacers?

many thanks