You could potentially use any aftermarket add-a-leaf that's compatible with the stock leaf packs with this kit. This kit uses a 2.5" stacked block setup for its rear ride height, so the only potential issue you may run into is needing to use longer U-bolts. Alternatively, you could potentially use a 4" or 5" rear block in place of the Rough Country kit to squeak out more rake, since separate rear blocks come with their own properly sized U-bolts.