Yeah the strut assembly is swapable, if you are intending to go off road rallying and need the extra ground clearance. as i said in another thread: The tops are longer, the bottom perch is in a different position and they have more travel. they are about and inch to 1 1/2" longer that the 2 seater. If you put them on the 2 seater you will end up with the "Rally look". There was a good photo of someone that put 2+2 rears on there 2 seater, been searching, but I cant find it. The back of the car had huge gap between the top of the rear wheel and the wheel arch. (maybe between 3 to 5 inches difference). Just to clarify: you cant use the strut cartridge inserts from a 260 in a 240, or vice versa. bits you can use: front crossmenber (has more reinforcing that a 240 cross member around the mounting bolt holes where it bolts to the chassis). front pivot arms, tc rods (i think), steering arms (though the diameter of the tie rod end hole may be different), steering rack (240 aparently has plastic parts in them, the 260z has metal). sway bar. All the pannels from the windshield forward. windshield.