Leon ...
In 1997 seven Chipmunks were converted with 180 HP Lycoming O-360-A1A engines. Apart from being able to confirm that the FAP deployed them for use as Initial Pilot Screening (which I understand was very similar to the RAF FSS) I'm afraid I can't catagorically say if they were aerobated.
Dora-9 might know, should he pop up on this thread
Cheers ...
Coff.