Small block 289 dual quad intake

[427heaven]

What years were the original small letter Cobra dual quad intake manifolds used... 63-64 into 65?

[Bob Gaines]

What years were the original small letter Cobra dual quad intake manifolds used... 63-64 into 65?

What application were you wanting info that they were used on?

[CSX4781]

That setup carries a 1964 Ford part number (C4OZ-6B068-E), was still offered in the 1966 Shelby American parts catalog as a Cobra branded accessory. Doesn't appear in the 1968 Cobra Kits catalog, although I personally saw one of those manifolds 40 years ago that said SHELBY rather than the normal COBRA. Only one I've ever seen. Hope this helps.

Dave

[427heaven]

For the Original early Cobras. Thanks in advance.

[427heaven]

Thanks guys for the explanation, Dan and others. So would a C3 dated aluminum water neck be a part of that early setup?

[427heaven]

While I am asking ... And which carbs were run on the early cars, 500 cfm competition Carters? What numbers would they have been, and were there any deviation on carbs?

[Dan Case]

Thanks guys for the explanation, Dan and others. So would a C3 dated aluminum water neck be a part of that early setup?

That is a good question. I do not know when Ford changed from the C3 prefix to the C4 prefix part. Bob Mannel's book might indicate timing. That assumes Shelby American kept the water neck and thermostat when they converted from 4V to 2-4V. Cobra wise 1964 model year and some Cobra only five bolt 1964 engines made with some 1965 model year parts were used.

[Dan Case]

While I am asking ... And which carbs were run on the early cars, 500 cfm competition Carters? What numbers would they have been, and were there any deviation on carbs?

1962 Chrysler 300H RB 413 engine AFB-3259S primary mounted in rear and AFB-3258S secondary mount in front. The only carburetor dates codes my research has associated with a new Cobra factory installations so far were in the second half of 1963.

Independent testers reported values for flow between 465 and 475 c.f.m. without quoting test conditions or manifold pressure during testing.

1961-1969 there were very many revisions to main castings and some small parts. The original engineering assembly drawings define many of the changes between 1961 and 1975.

[427heaven]

Another question..... Did the early COBRAS running the dual quad carb set up use
the Stellings and Hellings small chrome air cleaners, or a Cobra 8v air cleaner?

[Bob Gaines]

Another question..... Did the early COBRAS running the dual quad carb set up use
the Stellings and Hellings small chrome air cleaners, or a Cobra 8v air cleaner?

The Cobra marked 8v air cleaner did not come into existence until the 1967 model year.

[CSX4781]

The small Stellings and Hellings. See the photos. The paper elements aren't correct, but the screens in the other photos are, I had a bunch made.

Dave

[Bob Gaines]

Back in the day drag racers often could be heard giving the name "RPM Limiters" to the small Stellings and Hellings air cleaners .

[Royce Peterson]

Seems like the Carter carbs would be rev limiters too.

[427heaven]

I would think over 9oo cfm for a 289 would be sufficient-

[98SVT - was 06GT]

.....I personally saw one of those manifolds 40 years ago that said SHELBY rather than the normal COBRA.

When Shelby lost his trademarks to Ford in late 67 he had his parts cast with Shelby on them. When Ford brought out the Fox body GT350 Shelby sued them and was reminded he had lost the trademarks. To easily settle the suit Ford allowed him to use Cobra on 2 seat cars. Ford retained the GT350/500 trademarks for their use which is why CS had to build the Shelby GT when Ford brought out the GT500. I wonder if Ford is greanting SA to use GT350 only in 2025 or if they will let him use it and (maybe) GT500 for many years now that they seem to be not tying current Mustangs to historical models. https://www.shelby.com/Vehicles/2025-Shelby-GT350#:~:text=does%20Shelby%20do-,Sixty%20years%20ago%2C%20the%20Shelby%20GT350%20redefined%20performance%2C%20launching%20a,this%20model%20just%20as%20exclusive.