Trying to explain to people the difference between a 100M and a 100 with the Le Mans Engine Modification Kit so often runs into invincible ignorance that it gets pretty tiresome even trying.
The Chrysler they refer to is not a dealer. He was an individual Healey enthusiast - one of the best and most knowledgeable - who died of cancer in July 2012.
The BMIHT certificate indicates nothing but a standard BN1. Nothing Le Mansy about it.
By the way, both the Car No. plate (the VIN plate) and the engine number plate on this car are re-pops. It doesn't mean fraud, but it does mean you're a fool if you don't dig deeper and check everything very, very carefully. But of course we already know that it is not a 100M, so any premium a buyer elects to pay above the price for a completely standard 100 is only a reflection of the buyer's valuation of some Le Mans Kit parts and when, and by whom, that he convinces himself - with lots of help - were added to the car.
We should designate a new model of Healey 100: the 100CE, CE for Caveat Emptor.