Thanks for the comments guys.
I have played with TIG's extrude tools but I am not that good with them. I also dont see how it would work with so many curving surfaces coming together.
Mike I will try and make them the same hight but the body slopes from front to back and the roof is curved so I dont see how that will help.
Escapeartist I have modeled the van life size but I will try and enlarge it 10X and then use round corners plugin.