Actually I`ve seen a guy on Ebay selling the Mustang rotors that are cross drilled) for $100.00 a pair, shipping was a flat $26.00. If your son works at a machine shop, well you`ve got it made! If you`re still running the 7/16 studs on a 4" bc in the rear then you`ll probably want to have your axles redrilled for 4.5 with 1/2" studs and get your drums bored to match. This is probably a good idea if you start putting a lot of HP to the rear wheels. Moser Engineering did mine (it took a week from the time I sent them out to the time I got them back).They are a great company and I can`t praise them enough.HemiPar said