Yeah, behind the seats, are there two lids/storage compartments, or about 10 holes, roughly 2" in diameter? I really doubt anyone would take the time to modify/remove those.
Your 240z has an L28 and 5spd right? I have an early 240z, with an L28 and 5spd, and the shifter hole is trimmed to allow the shifter to fit, since it is farther forward. Later 240z consoles fit in mine just fine as well.