One mod I've been making on my last few vans is sailboat type cleats on
the sides of the pop top, allowing me to tie things (like lumber,
surfboards, etc) up there.  Two to the side one up front just behind the
luggage rack and one in back. I keep a length of line tied between them
so I always have it handy.

'80 Westy
John Jensen, Mudbug Pottery
mudbug@toadhouse.com , http://www.toadhouse.com