I'm not sure what you mean by stack it all together?
just put all the old parts from the original headset on the steerer tube
on the old fork, try to put them all in the same sequence as they were when on the bike
in the 1st place.. that is what I mean by stack.. like pancakes..
mechanics also use the term 'stack height', when forks were threaded,
you had to be concerned about how much thread was left to screw the last piece on top.
Then you needed the dimension of how much it required. stack height..