So I know that some trucks have 3 leaves and others 4(20s, max tt, fx4-i think). So do they all have the same size lift block or do the 3 leafers have a taller block to make them ride at the same height as the 4 leafs.

 

Good question!

I would say the three leaves are thicker than the four leaves. The blocks are all the same. Fx4s get 2" blocks, and FX2 get 1" blocks.

 

all i know of is in 2006 they have one less then 04 and 05. blocks are the same.

 

I believe the blocks are the same, the extra leaf comes with the max tow package.