I've got an 86 4runner with a full length roof rack.

What I want to do is make a system that I've seen on the hilux ute's around the place. The rear bar that runs down to the chassis will be cut in half, to the llength that meets the top of the tray/bottom of the canopy. A plate will be added that runs foward along the top of the tray, and then another rack support will mirror the rear one, and go up about halfway along the length of the rack.
My question is this:
I can't make the plate 0mm tall, so therefore squeezing it in between the canopy and the tray is going to lift the canopy the same amount... Can the system that holds on the canopy cope with being lifted say 4mm and still come close to sealing dust and water... What other things are invovled in clamping the canopy other than the securing bolts, and the front/top seals...? What would happen with the rear window?? Anything else I need to think of?
What have others seen or done??:-k
A future benefit (planned) is going to be that a 2" body lift will not have the same pain iin the a$$ effect that it would in the past, as the rack(rear supporting bar) was attached to the chassis, not the body. #-o So moving the body up would move it closer to the rack, within the bar loop at the back- a right pain...
thanks
