Please forgive the delay in my posting this. This past summer, inspired by Jim Leff's laudatory mention of it, I went to Sin Dulce on N. Main St. in Port Chester.
As I was checking the menu out at the front counter, I struck up a conversation with a patron who was sitting eating a cemita. He was a Mexican guy living LI, said he did a lot of driving around the tri-state area for his job, and tried to eat at as many Mexican places as he could. He told me Sin Dulce was tops.
I was hoping for daily specials, but it's a standard menu of tacos, burritos, tortas and cemitas, sopes and tlacoyos. I had tacos al pastor and arabes, and sopes. The al pastor was good, not great, and I unfortunately realized too late that I should instead have ordered the Hawaiianas to get the pineapple in with the al pastor. The arabes were excellent, made with pork, the juices collected at the bottom of the flour tortilla just divine. Sopes were interesting: much thinner than I'm used to, but really good.
Next time I'm in Port Chester I'll go back; I'll try a cemita or torta.