1977 Corvette. I have found that heat from the engine compartment is passing into the passenger compartment. I took the passenger door off to adjust some poorly installed shims and found when looking inside the front fender I could see a space between the firewall and the fender. I'm sure this car has been in a minor accident; I didn't pay much for the car and have been working on the rebuilding the front end, rear end, replaced gas tank, etc. I cannot tell if a part is missing or what else I am dealing with. Please see attached picture and let me know your thoughts. I would greatly appreciate some help with this. I just purchased the Corvette Assembly Manual with hopes I'll find a part missing.... Many thanks.