As far as I know all H23 heads (A, A1, A2, A3) are the same, and they all fit to F series block. Intake and exhaust manifolds also fits F engines (except F22Bx engines!). For my swap I used H23 intake and exhaust manifolds.
The only modification required for this swap is to put some sealant in one oil passage on the head, because F series block doesn't use this one (you will see it very clearly when you put F series head gasket on H23 head).

      For this swap you need:
      Complete H23 head
      H23 timing belt
      H23 crankshaft gear
      Exhaust and intake manifolds are optional, you can use yours or H23.

For my swap I used F20A4 head gasket, because it is right thickness, but you need to drill two extra holes (for coolant) in it.