Kayak on top of a topper?

I am looking at putting an old Barmah camper shell on the truck I just bought (it came with it, actually, I just need to pick it up from the neighbor and clean the heck out of it). It's a high-rise unit, and I'm at a loss as to how to carry a yak atop it.

I have a 12' SINK and a 10' SOT kayak, I'd like to get my son and I out on the water. Ideas?

Truck is a 97, 2-door SBXC. I don't have a roof rack, am wanting to build one of unistrut (a flat rack). However, given that I have the Xcab (thus, two levels to the cab's roof) and then the topper has a step up to it as well, this seems like either my rack will be extremely high, or at different levels. I'm not even sure a camper shell can take the weight of a rack- thoughts there?

 

Brahma has been out of business for a while now. Without seeing it there's no way anyone can tell you if it's safe to put anything on the shell- or even if it's safe to use clamps on. When shells sit on or near the ground the fiberglass, assuming it's not one of their plastic shells, can rot. If it's in good shape then you ought to be able to mount some rails on it; Yakima, Thule, Rhino and others make them. Another option is artificial rain gutters and clamps; you can find the older style for decent prices on ebay. Those concentrate forces in one area more than rails to though. The old school way to carry boats on camper shells was to bolt some 2x2s or 2x4s to the top with eye bolts towards the the ends for tying down the boats.

 

Thanks. I am going to test the top by a very scientific means- I am going to put it on the ground on 4X4s and see if I can stand my ass on top.

If it passes that, I was thinking I'd make an internal "cage" of sorts, with unistrut. Weld it together and have it bolt into the unistrut I am going to run down the sides of the bed. So I will basically have the topper with an internal "rollcage" support structure bolted to it.

 

I don't know why I didn't think of this. Just use a foam block across the tops of the cab and topper. tie down at bow and stern, to the tow hooks and the hitch. And, done.