This is where mine is, but it was put on specifically for a Rocket Box storage unit. As I see it (opinion follows) putting a canoe or Kayak's up there would require both easier (read: maybe further back) and weight distribution. I think that putting something heavy further back runs into a more seriuos problem of oversteer, not just getting the stuff on/off the van then getting the top up. You could always go to the more "oomph" struts.
 
http://tinyurl.com/3pjsev
 
 
Bob
'87 Syncro Westy
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