If what I'm hearing in this thread is true, then I have some serious leaks in my interior - thought it was my exhaust, but everyone who's had this problem has fixed it with interior seals. Classic Parts & Restoration sells a kit - this is what they advertise:
70-78 240Z/260Z/280Z
$225.00 220-0033 weatherstip kit, 15 pieces
This is for the two-seater only. The weatherstrip kit includes the following gaskets: cowl to hood, windshield glass, right and left door openings, right and left door lower seal, right and left door tops(for 260Z and 280Z), right and left quarter window to body, hatch glass, hatch opening, center outer hatch opening and right and left outer hatch opening.
For those of you who have done this, is this a good deal and , like am I in for a nightmare project?