[patrickt]

The rebuild kit will come with a couple of different N/S combinations. It will also have all your gaskets. On my Holley, two of the needle and seats looked like they were an exact match. One was .110 and the other was .097, but the instruction sheet that came with the kit indicated that the .110 was the correct match for a needle and seat marked with an “H” on it (which my needle and seat did). Here's a tip: Put a dab of Vaseline on the black O-ring; it makes the job way easier.