http://www.ford-y-block.com/fordpartnumbers.htm

The part numbers you refer to are the engineering numbers. These only refer to the original release date, not to the date actually released. I believe that Ford trucks (school buses, actually) still have some new parts put on them manufactured in 2003 that have a C2 number--such as the brake pedal assembly--which were introduced in 1962 and haven't changed. If you have a 1967 HiPo engine, your original cast iron manifolds would have a C3O-9431-B number for one side and a C5ZZ-9430-B for the other side, even though they were manufactured in 1967.

For a Ford, use the engineering release number as a tool among others to narrow dates down. For example, if your 1966 Mustang has a C8 coded engine block, you know you have a block (a 302 block, which debuted in 1968) that was manufactured after the car was built, thus not original. If it was a C5 casting number, you may (or may not) have the original block. You would have to check for other casting dates to help indicate originality. Even this isn't a failsafe way to prove originality (unless you have a HiPo block which has the VIN of the car stamped on it), because you can buy an engine built with casting dates about a month or two earlier than your car was built.

I hope this helps.

I hope I was clear enough that there is no difference between a 1966 4bbl and a 1965 4bbl casting number because they didn't release a newly designed or modified casting. Go ahead, buy any 4bbl C5ZZ-casting manifold. They were a pretty good design and only weigh 30lbs more than new aluminum ones.

quote:

---

Not that it matters but just wondering if this web page is correct.

---

No, it is not totally correct. There are three sets of part nos., Casting I.D., Engineering and Service Part No.

There is also a date code cast into many parts as well as the possibility of an assembly date stamped. There is also an assembly part no. as in a carb., engine or trans. I.D. no.

If you are searching for a concours correct part, there are many reference sources out there that will give you what you seek.

Ronnie T. gave you the most common casting I.D. no. for your application, although there were several other possibilties.

The date code is usually what will throw you;

-Reading Casting Codes-
__________________________________________

http://www.reincarnation-automotive.com/casting-numbers-page-2-ford-casting-numbers-explained.html

KULTULZ gave a web site that explains the casting number issue well. So often we (I) get in trouble by thinking I know more than I really do and buy something I think is a real find only to find out that my read on the part/casting/date numbers was at best incomplete.

quote:

---

Originally posted by BornInAFord:
Here is another reference.

http://www.reincarnation-automotive.com/casting-numbers-page-2-ford-casting- numbers-explained.html

KULTULZ gave a web site that explains the casting number issue well. So often we (I) get in trouble by thinking I know more than I really do and buy something I think is a real find only to find out that my read on the part/casting/date numbers was at best incomplete.

Daniel

---

It states that a MOTORSPORTS Service Part No. has M in the fourth position of the prefix. Actually, the M is the prefix and the basic part no. for the most part follows the P&A system.

You also have Holman-Moody Part Nos., i.e. C6HM. See how it differs from the regular system?

Shelby...S1MS is actually 1965 release but has 1 in the second position of the prefix. 2 is for 1966. 7 is for 1967 and so on.

It also states the character used on the suffix as they progress gives indication of part evolvement. Not always true. This is example only. C9ZE 6200-A may designate a connecting rod for a BOSS 302 whereas C9ZE 6200-B may be a connecting rod for a 428SCJ.

The suffix can also designate left or right, front or rear or just finish of the part.

Then you have another numbering system called The Standard Part No. that designates fasteners, springs and many other small parts that are used between all vehicles. On later FORD SPN, you will also see the inclusion of MAZDA (ESCORT-TAURUS) and NISSAN (Villager).

On top of this, FORD has changed their prefix system in the last few years. XF1Z will be a prefix. It uses the actual VIN to indicate year of production.

How about a real old one...prefix 7HA. H is the engine code of the vehicle and the A and 7 indicates it as a 1947 part no.

So you have to take it all with a grain of salt. It is not a cut and dry system.

-- It looked very similar to a C90X-B, Edelbrock F4B, or COBRA intake....but instead of FORD or COBRA, it had SHELBY cast on the front 'pad'.

One of these CS SHELBY intakes for a 429/460 was sold on eBay recently for $450! (The seller said it was cast for the never produced 1971 Shelby Mustang)

Ryan

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2409892929&category=36474

The carb (C4GF-AE) is from the MERCURY line (it is not listed as being used on the FORD side) so it may be possible that this combination (if it was actually assembled this way) could be off a COMET of that year.

Unusual that a 64 carb would be on a 65 manifold. This is why I never got into restoration. Too many ifs, ands or buts.