If you have the stock wheels (like you said in your post), none of the above mentioned sizes will work.
Your stock wheels are more than likely a 14" x 4.5" so a 215-70-14 would even be a bit big.
I would stick with a 205-70 or 205-75-14.
If your car is a factory 340 with the 14 x 5.5" wheels, you can go a bit wider, like the 215-70-14 I mentioned.