So I just purchased a set of these wheels in 19 x 9's and 19x 10's for my new Boss.They are also the correct off sets 42 and 45.I am familiar with Forgeline thru my Porsche racing days..They are currently running wheels in Grand Am.The wheels are 18 and 19lbs each! An excellent wheel! I am very excited that they are making them for the Boss!See ya unsprung weight!
http://www.forgeline.com/products/competition-series/ga1r.html
http://www.forgeline.com/products/competition-series/ga1r.html