Oh, I just read your post again. You did say that yours has some mods. You are basically, in my opinion, comparing apples and oranges. Also, no matter how fast yours could be, it is still an older car. Don't get me wrong, ours will also be old in a few years.
Now for the joke.........
I bet you that my oldest modified Porsche can smoke your 350Z. I bet yah that my brother can beat your big brother.
Just teasing you, man.
Again, cherish your 350. In the meantime, we will cherish ours.