428 Cobra Jet question re Aluminum intake in STOCK

[DeuceCoupe]

Originally Posted by Mike Gray

It may be a mistake, checking on classracerinfo.com I found the only restricted manifold was the -C cast iron
Intake. The intake manifolds vary depending on hp ratings and heads used.

Intake Manifolds: Casting No.
C6AE-H Aluminum
C7AE-F Aluminum
C8OE-A Cast Iron
C8OE-C Cast Iron May not be used in Stock, SS ONL

I looked at the NHRA blueprint file, note #6 is alternate intake and list the two aluminum intakes.
Where did you find the ?may not be used in stock? note as I don?t see it?

WELL the .DOC files all look different now vs the ones I downloaded circa Aug.2008. Thats where I got the language I copied to start this thread.

Now, in the .DOC files, all 4 intakes you listed are LEGAL in Stock, for all 3 years 1968-69-70.
The online detail also shows all 4 intakes legal for all engine combos & years ie
1968-69
428-A
428-B
428-C
428-D
1970
428
428#

Exception:
1968-428-335-B shows
C8OE-C Cast Iron May not be used in Stock, SS ONLY

No reason for the extra words to be there- of all intakes, C8OE-C should always be legal on any 428CJ (except maybe the 1st 50 cars built in Dec 1967 with C7AF-F) because after very early 68, every 428CJ came factory with C8OE-C iron.

So I think this part
1968-428-335-B shows
C8OE-C Cast Iron May not be used in Stock, SS ONLY

Is just an echo from the old files. Needs to be fixed in here:

http://classracerinfo.com/EngineSpec...3030&MAKE=Ford

OK so now, all the intakes are legal for all years.
Our guess on the Ford forums is that
C7AE-F
C8OE-A
C8OE-C
should all be legal for Model Year MY68 because cars left the factory that way, C7AE-F on the 1st 50 (Dec 1967) cars, then C8OE-A iron early on, then C8OE-C iron.
C6AE-H was not used in production, but is identical to C7AE-F except for the thermostat housing hole so makes sense to make that legal too.

For MY69-70, only C8OE-C iron was factory, but I guess the rules are getting more liberal now.

This clears up a lot thanks for reminding me to look anew at classracerinfo.com