I am pretty sold on some 6" eye-to-eye toyota front axle shackles, not too sure which company I'll order yet:
http://www.datinfab.com/toyotafrontspringshackles.aspx
http://www.trail-gear.com/shackles
http://www.4crawler.com/4x4/ForSale/Shackles.shtml

Since my stock shackle is 3", am I correct to assume a 6" shackle will give me 1.5" lift rear?

And please if anyone could let me know if Montero upper control arms are worth pulling?