will they work?

http://newyork.craigslist.org/jsy/pts/4684478489.html
hey guys and gals found a set of wheels on craigslist that are just about what im lookin for. I was looking for 17 or 18 inch wheels but found these. I know alot of members run the 17 and some the 18 inch mustang wheels but these are new style 19s. I've been searching for probably over an hour to seen someone has discussed something similar to this but I've had a hard time finding anything. I personally don't understand all the offset and back spacing and all that measurement off the top of my head. So here the are 19x9 mustamg wheels. Will the fit stock and if not what would I need to do to make them fit? Thanks in advance