Yes there is a way. I swaped my 4 piston Kelsey Hayes sbp disks for Willwood bbp disks but there is a catch. Willwood only makes a kit to go from sbp drums to bbp disks. All you have to do is swap the sbp spindles for a sbp drum and add the lower ball joint for the sbp drum (about $20.00 from Rock Auto). I also found that I wanted more stopping power so I added a master cylinder from Willwood along with a adjustable pushrod from Stainless Steel brake corporation and a adaptor from 4 bolt to 2 bolt to mount the new master cylinder (all available from Summit)