Yeah, assuming your YYZ flight isn't delayed, you should be fine. Preclearance? You mean, GE, CLEAR or TSA Pre? Whether your check your bag through is a personal choice, but I'd probably hang on to it, assuming it's just a standard carryon roller.

Sorry, got it. Preclearance as that thing thing do in DUB for US flights. Yeah, perfect. You'll just likely disembark into Int'G (assuming here) and just catch your NH (in Int'l G, if I recall) flight without having to deal with security. You'll have plenty of time, even to relax and have drink/meal in the lounge.

PS - I've complained so much about those Amex chicken thighs, it might be some violation of TOS to keep harping about something a million times.