Can't say whether you will need a short or taller spacer stack, sight un seen , Like I say get 2 sets, have some above the stem, so if you change your riding posture to want the stem taller , the steerer tube length will still be there., you just re clamp the stem on top of more spacers.

A couple big fender washers (wide but with a smaller hole) a length of 'all thread' and a few nuts ,
withthose simple parts you can fabricate a headset press to press the cups of the new headset in

crown race seating tool is a tube just a little bigger than the steerer tube . aluminum good for a single use, steel better for multiple installation

end has to be square though, Tubing cutter in aluminum, lathe cut off better in steel.