Well both really. With a stock-ish shackle most 63s would ride maybe 2-2.5" taller tan your Toyota springs based on what I have experienced. You really just have to mix and match until you get the desired result though. I like a 4.5-5.5" shackle and I add a few more leaves to the pack. These things are pretty soft if you get them off a 1/2 ton.