His car is a series one, and yours is a non-US '78 260Z, so you should expect a bit more weight, all else equal. I read a post from John C once saying that an early 280Z chassis was 100lbs heavier than a late 240Z, and a late 280Z was 300lbs heavier than an early 240Z. Seems like a big difference for just a chassis (I believe that was the context) but that's the only info I've ever found. I have a '76 chassis and an early 71 chassis, and I'm hoping I can weigh the two while stripped down and compare. I don't know how the non US late models compare to the US models.