Ramcharger concept?

We have a second generation Durango(2008) bought new.
It seats eight. Now 6' plus 300 pounders will not be happy unless they're in the front seat.
I think the same year Grand Cherokees had 10" shorter wheelbase, don't think it'll seat eight.
Ours has about 170k miles and has been almost trouble-free.
Very little cargo space with the 3rd seat up.
Easily one of the best vehicles we've ever had.