I'm considering building a truggy for a play car. One thing that concerns me is the heat from the engine/trans/radiator coming into the passenger compartment while running. I'm curious, how hot does it get in the interior of a front-engine car? The car would have a windshield and full firewall. I'd also run insulation around the floor and firewall, and would even consider a double layer of aluminum with insulation in the middle for the floor, firewall, and trans tunnel.