Have you got a star nut for the top of the fork.? You can reuse the old one if the steerer tube is the same diameter all the way down which will allow you to knock the old one all the way through. To fit the star nut, screw in a bolt and tap the star nut down into the fork by a about CM.

Can I reuse a Crown race?

yes tap carefully, and it’ll come off fine.

How far down should star nut go?

Star Nut Installation with TNS-1 The TNS places the nut about 15mm (9/16″) below the top of the steering column. This allows the adjusting bolt to thread fully into the nut for adjustment pre-load. It can also help maintain alignment to use the stem as an alignment guide.