Re: Here I go
I'm local to Larry/Action Van and have been over to his shop a few times when I was considering a lift kit before I found a van (I ended up with a 4WD drive so no lift kit needed.)
His setups deal with RSC with a special Pittman arm.
I have about 4" of lift and with 285/70-17's and have trimmed the rear fender wells and still have some rubbing, so these may be tight. I suspect that 265/70-17's will work OK. Of course my front end is completely different than 2WD but it's another data point. There are quite a few threads here on lift kits and tire fitment; the search button is your friend.
2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2000 KTM 200 EXC
2003 Honda Element