Going from 3.5 to 4.5
 

I have a Rough Country 3.5 lift and I want to lift my ride higher.
What do I need to change or add?
Just front spacers ?

Thanks in advance

You can get coil pucks, 2in is normal, I haven't seen any 1in pucks. And a add-a-leaf or a block in the back would work for the rear.

A 3.5in rough country lift? I thought they only made 3, but you could go with a spacer and either blockes or longer shackles for the rear, could even find some longer springs or leafs if anyone is selling them

Don't use blocks.Get a set of Comanche shackles.You could get front 2 in. spacers & cut them in 1/2,then you'd have a 1 in.spacer.