Yeah I`ve seen a couple , on my travels ,also a BMW estate , plenty of space in the back , take the back seats out and i guess you could put in a flat 350 tank too .
I like Bobby `s comment understated , you dont want your customers thinking you are having it away ,, turning up in a new van ,, just keep it clean , for me that sends out the right kind of message ,, but hey what do i know , its an opinion i`m offering you .