Upgrade 6" to 8"or 12" lift.

I have a rough country 6" lift kit currently on my 2nd gen tundra. Looking to step it up to 8" or 12". I have to replace most of my front end suspension so I figured now is the time to upgrade since I have to replace parts. Do I have to buy the entire kit to go for 6" to 8" or 12"? Thanks in advanced for the help.

 

Yes. The taller lifts will have different geometries that will work with their components: spindles, drop brackets, and coilovers. You could try keeping the RC drop bracket and mix it with the other parts but why take that chance?