240Z-ZZ4

Thanks for the info. I have dual spin tech mufflers with tailpipes that extend past the bumper. I just read past threads on this subject and think I have a handle on what to do. It looks like I will be crawling around the interior of my car this week end and taking a better look at the rear hatch and rear light seals. Although, I'm not so sure I want to fix this problem. My wife probably will not want to drive in the car with the fumes--Drive fast, with fumes, no wife---Drive Slow, no fumes, with wife. Tough One!

Its been about 20 years since owning my last 240Z(70 LT-1 equipped). I have just purchased a very nice 1973 Silver 240Z equipped with a 350 ZZ4 crate engine-World CLass T5- R200 rear end-Modern Motorsports Coil overs, 5lug conversion,4 wheel disc brakes, 280zxt CV axel conversion. Now to my problem, which I know is typical w/ early Z cars, exhaust fumes in the interior. It is especially bad with the windows down. My 2 earlier cars had it and so does this one. The rear hatch seals were replaced by the previous owner and are less than a year old. If I remember correctly, it is a areo dynamic problem inherit to the car shape, the fumes actually whip around from the back hatch area to the open driver's window. The fumes are less if the lower pull handle vents are open, but is still pretty bad. THE QUESTION IS WHAT CAN I DO TO STOP THIS FROM HAPPENING? Thanks for any help you can give me!