The forward pylon post right?

Install an inspection port in the deck. Aft of the post is best, but plenty have been done just ahead of the forward crossbar.

Tie the hull to the trailer or a 4x4 cross beam. Place a jack on the trailer / 4x4 and jack the crossbar / tramp frame up to the original height off the hull.

If the "Shoe" is intact in the hull, you may be able to just pour resin with some filler into the shoe cup to re-bond the post into the cup.

Chances are that the shoe is damaged. You may then have to repair with glass and resin. Bond the shoe into the keel and the post into the shoe.

I am sure these are threads elsewhere on this repair.