[pbaddict03120]

I have a 1990 RX-7 I bought it and I test drove it everything went good. So I bought it. I drove 20 miles to get gas and it smoked like crazy on startup. So I called the people back and they refused to take the car back. I'm kind of stuck on what to do about it any help would be great on what I should do.
Also if I am stuck with this car I was thinking to rebuild the motor or replace it. What should I put in it? JDM 13b t or would a 13rew be out of the question since every mount is different and would it fit. What would this cost for both engines if it is a stock 13bt i would replace it myself because i am in an automotive program at Wyotech and can use these facilities. Any advice is welcomed.