A bunch of guys in Australia have done 6 inch lifts, might be a good idea to tap their brains and see what they did.
www.outerlimits4x4.com and 4wdmonthly.com.au
I'll be adding a 6 inch lift to my project 79 so i can run 37's and I'll need to figure it out as well. I'll probabaly get the dropped radius arms they have:
http://72.34.32.141/~snakerac/produc...b18629d5bf0c66
And I'll coil the rear end as well. Probably use 80 series front and rears with lockers, or maybe even a nissan patrol front end if I can get one - they are supposed to be pretty beefy. Or, I might just keep the 79 series front and rear ends - the brakes are huge and they stop better than any cruiser I have ever driven with a load on. Decisions decisions.