well new mustangs have the five lug bolting and i think yours has four
I would just find a solid donor car and pull the rear end and front spinals from that. Just remember that you will need a new
tranny and radiator as well as motor mounts and possible front shocks to handle the extra weight.
There are literally thousands of disk break kits. You just need to pick the right one for your application, be it a racing or a standard street application. That is something thats your decision and as far as a good place to start looking is either at Summitracing.com or CJpony parts either are excelent. CJ's does nothing but Mustang everything and they can suggest some better quality kits and their advise is solid. Summit is a parts depot that has a bunch of great stuff for all cars.