i was wondering if you could use any of the old 280z suspension parts on a 2005 g35 since they are basically the same design, i've got a 280z sitting in my driveway doing nothing and was wondering if i could swap any parts over to my g?

 

Sell the car and use the money to buy parts made for the G. The parts from a 350z will work, but I can't imagine the suspension for a 30 year old car would fit on a modern car that weighs quite a bit more. Depending on the state of the 280 you might get a good price. I would check out 280Z forums and feel out interest. In fact, post pics on here so we can see what it looks like.