I'm really confused. You plan on running without the front O2 sensor? How do you expect the ECU to calculate fuelling? I doubt you'll meet emissions without an operational sensor mounted in the exhaust stream.
To answer your second question, I'm not running at all right now; the first thing I did after getting the engine to start and run ok was to send my ECU to KingPin. Good ol FedEx sent my ECU to the wrong coast, so I'm looking at a total of 8 - 10 days down time