If you can downsize to carry-on bags you'll have no problem. I do it all the time with less than an hour.

Checked bags will be very difficult. You have plenty of time to get thru security but Seaborne probably has a 1 hour cutoff so you only have 28 minutes to deplane, get to baggage, and back up to the counter. Check on the cutoff time with Seaborne. It's a hard cutoff on InterCaribbean because the gate agent physically goes up to the gate at the 1 hour mark.