the emb 170 can be ordered with FC seats (1-2) and UA's will be. US's were ordered with all coach.

the CRJ 170 (i think that's the number) can also be config'd with FC seats (1-2). HP's had them. they were sent to UA, so now they operate two RJ types with FC seats.

CO emb's cannot be reconfig'd easily for FC b/c of the location of the galley. unless they replaced the last four rows with three rows of 1-1, then it would be impossilbe without redoing the entire AC.