I took a quick look at the 300ZX last night, it only has 4 bolt wheels. I was trying to find out of the brakes could be adapted to my S30 without too much trouble, but I don't think it'll be worth the hassle.
The blue S30 had been stolen or written off at some point in time, it has an Alberta Government issued VIN, unfortunately. It's headed to the great Datsun racetrack in the sky later this week, I don't think there's anything left on it worth salvaging.