Kayak rack suggestions for 03 F-150 supercab with tool box in bed

I have an issues I am hoping someone might be able to help give me suggestions.  I just put a down payment on a 2014 Hobie Outback.  I have been tying to determine for quite some time now how I would in the most economical way mount a rack system on my truck to carry a Kayak when i got one.  I had many ideas and all seem to have some issue preventing the execution.  I should start off with the toolbox has never seen tools it carries all my fishing gear so i want to keep it on the truck.  My truck does not have internal rain guards at the roof so yakima and thule do not have systems to have a rack on the roof for support of the kayak unless you drill holes for a permanent installation.  I need to have the kayad mounted more in the middle of my truck because i want to carry the kayak while i tow my bumper pull travel trailer.  I think the best way to doi this would be a lumber rack.  I drilled holes in the toolbox and bed rail and mounted it with bolts, and i would like to keep the toolbox on the truck.  I do not need a heavy duty lumber rack for the weight of the kayak, so i was wondering how hard it would be to build a custom lighter weight lumber rack and be able to keep my toolbox also.  I do woodworking and have some ideas just not the metal working or welding skills.  I am attaching pics of the truck and toolbox also.     I am sure someone will say just use the racks already on the trailblazer  , but the trailblazer can not pull the travel trailer.  As a temp soloution i could get some adapters to load the kayak on the trailblazer to go fishing.


Shawn

You might be asking the wrong question here. Instead of finding a system to work with the tool box in its current installation, I would try to move the tool box aft to the point where a standard rack is possible. I think that would be the easier solution.

Here is a pic of the TracRac system I have mounted on my 97 F150 for my adventure island. The system uses 2 screws on each leg that tighten up on the inside of the lip of your box. You can adjust the racks to what ever distance apart you want or take them right off if you need to--it only takes about 10 minutes. No drilling necessary. Sorry I don't have a better picture.
T2

Is that a short box or long bed? 

If short box I got a pretty simple setup I put together with 1.5 inch tube steel.  With the tail gate down the tool box works like a ramp allowing me to push my yak to the top of the front bar from the tailgate.  I think a long box might make this tough to do from the ground. 

I also need to add a couple bars attaching the front and back bars for more rigidity.  Along with some UHMW strips on the tool box to make it slide easier.

Thanks everyone for your input and suggestions.  I am coming to the conclusion that the toolbox will need to be moved.  So now just trying to find the most economical direction to go.  It would be nice to find a lumber rack to fit my truck on craigslist for cheap but I  have not seen anything yet.

Shawn

Hey Shawn....I ended up with a shell/canopy on my Ford, but had considered this rack from Harbor Freight. Its presently on sale for $99 and with a 20 or 25% off coupon, you could walk away pretty cheap. Here's a link in case the picture doesn't attach...Dave

http://www.harborfreight.com/http-www-harborfreight-com-250-lb-truck-ladder-rack-66187-html.html

This what i ended up ordering.  Ordered two sets got 15% off order of $150 or more free shipping no tax.  Total ended up being $194.  Should get them in about 7 days.  I will post pics once i get them installed.

http://www.autoaccessoriesgarage.com/Truck-Racks-Van-Racks/ProMaxx-Truck-Cab-Rack

Shawn