the Z has a staggered tire size, and these wheels in question already have tires on them, assuming theyre stock size, theyre quite a bit bigger.I am rockin some 18" rims off of a '05 infiniti g35. I'm not sure if those 350 wheels are 18's, but I would guess so. I would also guess that they both have similar offsets, given that the 350 and g35 are pretty similar. I haven't had any issues with rubbing or anything, I have 225/40/18 tires on them. You can check out my thread where I put them on, but I'm a little too lazy to find it. Just type in "g35 rims" are something like that. Hope I was able to help. +1 for originality!
you have a staggered offset, but the Z wheel/tire combo actually has a bigger tire on the rear. dont know if the raer wheels themselves are wider...technically i'm running a staggered set of stock wheels. i've got 15mm adapters in the front and 25mm adapters on the back, so the wheels are flush. you should look into some stock rx8 wheels IMO.
long story short: one could probably run these wheels with different tires.