Hello i have a question i got a 2004 tahoe on 24's and i want to drop it 2' inches to rear for now to level it front and back for now do i only need to purchase drop spring but later in the future (hopefully in the next two months) i want to do a 2/4 drop but what would i need in order to drop it to that level i mean for the front 2 and back 4 how can i lower the back 4' thanks for viewing my post