Well Folks, Thoes that want to put 350Z seats in a 280Z are going to run into problems on the drivers side. I have been at it most of the day. Not sure about the 240Z but the 280Z's tranny tunnel comes out a good bit blocking the rails when trying to install the seats. I scratched my head for a while and think I have found a way around it. I am going to space the seat up alittle using round tubing. I tried it out making the spacers kinda tall, 1.5" in the rear 1" in the front. This makes the seat fit but you sit up way too high this way. I am going to try cutting the rear spacers down to 1" and the front down to 1/2", With the adjustability of the drivers seat this should and I sure HOPE this works. I am taking pics and will update this thread when Im done.