pcm tuning
are you looking for a way to run the engine off a computer without having codes?
or are you looking for a way to turn those codes 'off' so to speak through a tune?
purge/evap/rear o2s/random emission codes are most likely due to you not having emissions related systems on your swap in which case a mail order tuner like Frost can disable those codes from appearing, while still being able to read useful codes that can help you diagnose issues in the future.
some more info on your swap and a more detailed description of your ideal system would be helpful.
are you still using lsx sensors? are you running o2 sensors at all...info like that would help
p0443-evap emission purge control valve (2x)
p0449-evap emission vent valve malfunction (2x)
p0452-evap emission system pressure switch(low input) (2x)
p0135-o2 sensor heater circuit bank#1 sensor#1
p0141-o2 sensor heater circuit bank#1 sensor#2
p0155-o2 sensor heater circuit bank#2 sensor#1
p0161-o2 sensor heater circuit bank#2 sensor#2



