well -- thanks for all the kind words guys it really warms my heart that a car can bring such compassionate guys to one insiginificant spot in the vast sea of cyberspace. my radiation starts soon...we'll see how that goes -- I dont think my condition will be terminal, my doctors said I have a high chance of finding a marrow donor due to my O bloodtype

Sounds like good news thus far with all things given. Stay strong.

Doesn't the 280ZX 14x6 inch wheel have +12mm offset?

So you don't nessisarily have to have 0 offset on any wheel. I think the turbo model has +10 on their 15x6 wheel.

Another question would be, how much offset do some of the 15 and 16 inch wheels for a 240SX have? They are RWD, but are the hubs in the proper position to be used with old school RWD cars?

I used some Z wheels on my 1st Gen Maxima, and the wheels stick out pretty far compared to the stock Maxima 14 inch. So I think the Maxima can use wheels with a greater positive offset because either the fenders are narrower on the car or the wheelbase is wider.