I was about to state that I do not have this issue. I got my car running in March and my first long (200+ mile) drives were in the cold(40-55F). Then I had the hot rod on jack stands for two months as I was adding stuff. This month I drove in the heat (80-90F) and wow are you right about the hot air blowing in. Even with the sound proofing and carpet, hot air just makes it into the cabin. I was happy to test the AC. Funny that I did not notice this on the Cobra....Oh yeh, no roof.