I am looking for the firewall to heater core box seal, I am having water intrusion issues around that point in the car. If anyone has any thoughts or ideas please share! I have found them for everything prior to 71 and post 77 I think but none look like they will sit in the intake like the factory one did, I unfortunately didn't keep it because it literally disintegrated when I pulled the dash and was inspecting the fire wall because water killed 3 after market radios.