Hi!
It's nice to see someone else with a diesel engine!

I have no experience with lifts yet, but I have ordered +1.5" springs and already have a 2" bodylift from RRO (still in a box). I plan to try later what shall fit.
In any case, I think you should take a look at nomaad's xl-7, although it may be different from the GV, it should show that it is going to be tight. he has the calmini kit (+2.5") and the body lift, and those 265/70/16 (30.7") are really tight. With the setup you propose, I think a 29" would be much safer (like a 235/70/16).
I insist I hava no direct experience though...
By the way, here is a link to nomaad's tires:
http://www.zukiworld.com/cgi/yabb/YaBB.pl?board=xl7_talk;action=display;num=1111683882Edit: there is a post in this same section that also discusses tires. This is the link:http://www.zukiworld.com/cgi/yabb/YaBB.pl?board=gv_talk;action=display;num=1106454747