So far heat has not been a problem - about the highest temp I've seen sitting at a light is 80C. The
oil doesn't get much above that either. Sitting at a light I do start to feel a lot of heat welling up from under the car and spilling over the side of the doors but that is pretty much typical. I have weatherstripping around my hood opening to mimic the street roadsters and that is probably not a good approach. I think a few pieces of intermittent weatherstripping or hood bumpers would allow that area to help vent underhood heat a little. I do have ceramic coated headers, head pipes and mufflers and a lot of insulation in the cockpit. Those mufflers are right under the seat and about 1 inch off the floor board and when I've shot them after a drive they are somewhere around 500F. I have Lizardskin on the underside of the floors and B-Quiet and Kool It on the top side under the carpets. It's mostly the heat welling up from underneath at stop lights that I notice.