Bill Gilman
This was discussed recently on the Tailhook Topics Blog - some have complained that the Airfix kit is too short, but it's because of the shorter nose. You can check it out here:

tailspintopics.blogspot.com/

Christian Lehmann
Thank´s Bill. So the length is correct for a B. The rest is rivet counting at it´s best ( from my point of view) because the kit can clearly been identified as an A-4 🙂
Btw: Freightdog offers a kit that includes the A-4C nose cone..