Top picture is mostly Dodge and Ford vans. Bottom pic, I see one Chevy. 70s vintage vans are true survivors because the tin worm would go ape on them.
The first band van I ever drove was a '76 Chevy that was an ex-conversion band. As the band got more gear, more and more of the van's interior was gutted until you were left with the two captains chairs up front and lime green shag carpeted shell. It ran well though and always got us to the gig and back again, which its' successors cannot lay claim to.