[spinning wheels]

Before you change heads, make sure you have the correct manifold. Round port heads with round port manifold. Square ports with, well you get the point. Also, some heads are closed chamber heads. Higher compression. Which means you would need to run Premium gas. Right now at over 2 bucks a gallon in the US. Ouch! that would hurt on a road trip.
Most likely, the truck heads have a lower cc flow, so you may not see a performance increase. You would get some good torque and bottom end tho.