well i tracked down my miss/stumble to the O2's but they are brand new and the car still runs like ***. here's a little background: when i drove my car home after the new 355 it ran o.k. till i got home then it started to miss and stumble at low rpms. i havent really got on the pedal yet cuz im still breaking in the motor, but i had it open headers so i guess they got fouled out so i replaced them. the car still missed/stumbled till i just disconnected them and it ran like a champ, figured that maybe the O2 wires were burned but i rewired them and it still does the same thing. its really got me pulling out my hair cuz i dont know what to do anymore . anyone got any ideas as to what it might be? posted this in the speeddensity board and they pointed me towards doing a 4 wire conversion and it might solve my problems, but i dont wanna get my hopes up and its still going to do the same thing.