There not so bad if my 84 passed with flying colours most will past there a few thing one should do before the test
mine sat for 12 years in past it easy ,if any one need help on what works to past the test i talk to many of the test guys in a few mechanic the repair them for the test over
They all say the same prep before the test
Oxygen sensor
New plugs make sure the wires are good
Cat/ converter in good shape
Burn ethanol a week or so before the test
Clean oil in filter
Good gas cap may wont to get it test or bye a new one there cheap
Have the engine nice in warm before you bring it in for testing