Old favourite...cant get through emissions, only has induction filter, and cobra cat back exhaust, cat was hot, she is definitely overfuelling, any ideas?

Ouch
I'm thinking possibly MAF as she has been sat for a few years?

 

lambda reading is out but that doesnt necessarily mean its a bad lambda.

Start with quick, easy checks. Check all the vacuum hoses are connected and in good condition with no leaks or cracks.
Check wiring on as many sensors as you can
clean the MAF

 

As above plus , temperature sensor can make it run rich as it does not think the engine has warmed up , i heard a rumour maybe an old wives tail , get it tested with no air filter in it