Concur with all the previous posters. I'd bid narrow body even if you can't get ewr right off, by the time you finish IOE, you should be able to get into ewr and life is way better with seniority which you will get on the narrowbody before you will on the 756. The other reason is basic rsv vs global rsv which the 756 fleet sometimes gets. Living 3 hours away, you don't want to be on global rsv especially covering 3 bases.