I'm working on my first project car, so my knowledge is kind of limited as far as my options go in certain areas. The car is a 74 Duster with a 225 S6 that I'll be dropping a 400 in. It already has disc brakes up front but only has single piston calipers. I would like to find a brake kit with 4 piston calipers but not sure where to look. Also any suggestions as to what I can do for a rear end in this car would be great appreciated... I would rather not have to buy a completely new rear end right now.