Other than what Lance said, the 142A's are Kawasaki, so that's why they are doing the conversions as well. The R142's are Bombardier, and will not be modified. Therefore, in all actuality, there is no reason they would be working on this contract.
I see what you are saying. I didn't know that lot of 142A's was already CBTC ready though either. I'm still learning about Subways. We will see though!