Two hours is plenty of time, the MCT for this is 1.1hrs - see below
STANDARD.D/D...D/I...I/D...I/I.
ONLINE .40 1.40 1.40 1.10
OFFLINE .40 1.40 1.40 1.10
Flying the 747 one more time is a great idea, I am considering it too ^ maybe a trip report will be in order?
Enjoy!