If you are going to give up the bed space for the stacks anyway why not just run a bed mounted radiator like the serious mud runners use? You could make it as big as you wanted with a huge transmission cooler too.

Randy - there is about 6" between the grill opening (which is pretty big to start with) and the radiator. Plenty of room for the incoming air to spread out, lose speed, and more effictively cool the radiator. I would be more worried about getting the hot air out of the engine compartment. With all that motor and heat I think he will end up having to vent his hood like Spicer did. You like the look of cowl induction don't you Snake? lol