The point that I am trying to get across is that EMD export/license built production over the last few years, is higher than US domestic (prior to the skewed marketplace in 2014), in 2012/13 the number of DLW Varanasi produced GT46AC exceeded Muncie's domestic totals
The 710 will become an export prime mover. EMD's export market could not give a toss re US EPA standards. EMD tailors export engines to customer requirements, Do you think that the likes of Indian Railways will change spec to appease US greenies? The EPA only has the authority to dictate US domestic standards, they have no power to dictate on what is exported
EMD domestic locomotive production 2013 was just over 250 units, 2014 was an unusual year due to the pre Tier 4 rush, with around 500 units built, however the bulk of these were subcontracted to Bombardier in Mexico
It will be a few months before the final 2014 figure is confirmed (due to uncompleted units being delivered ahead of the Tier 4 cut-off, and stacked at customers premises to be finished Q1 2015)
There will be little EMD domestic production 2015 and 2016. EMD will be heavily dependent on Muncie built export locos and CKD kits, 710 engine exports, and license fees, until their Tier 4 engine family is certified by the EPA (possibly Q1 2017)