It is located in section 94 page 10.
If you have a complete copy purchased from a typical retailer, look at page 1756 that will get you there, or at least close.
If you are using the free squarebird site (sounds like a Lynyrd Skynyrd thing there) go to the "13" fuel system link in the "text" area.
But the information that Jim provided is accurate and complete.
Also you won't be able to verify the "casting number" because it is in this case different than the "part number", the latter being what the MPC will list.
A casting is a huge expense, and when possible the same casting would be used for more than one unique part to save money. After casting there could be machining (in this case there is), and there might be two or more variations, resulting in more than one part number. In some cases, other components could be added to a casting (a brake master cylinder for example) which could result in quite a few part numbers using the same casting.
This is why Jim said that "I would guess the second (D2OE-) is a 2V head." He was looking at the MPC listings for the 4V, which both started with a D1ZZ prefix, whereas the RH 2V started with D2OZ.
The Mustangtek web site, while not perfect, does a decent job of associating pictures with part numbers and occasionally casting numbers.
http://www.mustangtek.com/exhaust/Exhaust.htmlThere is also a discussion on casting and part numbers here:
http://www.mustangtek.com/FordDecode.html