It'd probably be betterto custom build a heatsink for the GPU, since it's design to suck air from the fan and blow it out the front and back, or just the back.
this is where I got lazy in the drawing process. i meant to draw like a side connector plug for the mo/bo (i'd need to anyway lol) that made the graphics card to sit some degree lower than the lappy's max. height. this should allow air to seep in from the top. also i've never seen a card that exhausted from both sides so adding an exhaust vent to the front in the GPU area wouldn't be a bad idea. that would be a bad idea if you had plans to fit the internal audio on the front of the laptop though. hmm i wonder how long the huge battery would last under let's sayyyyyyyy 400-500 watts constant load? maybe an hour, possibly 2 or more considering the sheer size of it. would be a bad@$$ battery to have in a regular gaming lappy. i bet it would push 10h easy on max load in a standard gaming lappy O_O.