I get where the truck is a little small for a family of four. But you obviously have a love for this style truck. And you have the skill set and family help to pretty much build anything you want. Maybe buy a burb and shorten it up like Frizzles? When you need to haul more than the shortened burb will hold (seldom Im sure) maybe a neat little matching truck bed trailer. There ya go I covered all your bases for you lol. You did a nice job on this build.
Here is a link to Frizzles build ...
http://67-72chevytrucks.com/vboard/s...d.php?t=239896