Intake - small letter “No Name” S1MS

[6s1640]

Hi all,

I picked up this intake years ago because of its uniqueness and similarities to a S1MS 1965 GT350 intake.  The nameplate is blank.  The temp sensor  provision is the smaller version.  There's no firing order nor part number . The  casting features for a PCV connection are absent and the casting sprue, typically with a manufactured marking,  has been trimmed off. There is a threaded hole in the very aft runner, No. 8.  What is the origin of this Intake?  Is it a prototype? Is it a test part to validate the casting? Is it an early production part?  Is it someone's creation by modifying a S1MS manifold?  It's a mystery to me. What do you think?
Thanks for looking
Cory

[brandosaac]

I cant tell you, but it does look like a small letter intake casting
without any numbers or letters , maybe its a sample / test run?

[Bob Gaines]

I have seen one or two in years past which that had numbers and letters where the Cobra letters would be. The small diameter temp was what stood out on the early style in my mind because I have seen the later version that was similar but they had the larger sender hole and a threaded PCV vacuum port.   

[6s1640]

Hi guys,

Thanks for your input.  A fellow, very knowledgeable and long time SAAC member, sent me a PM.  This is how I interpreted his input.  He is suggesting that the manifold may have been marketed by some other Non-SAI Speed Job or retailer. (Maybe even approved my SIA, Ford, Offenhauser or other supplier.) To avoid issues with licensing or other infringement, the retailer may have had the manifold made, from the same supplier as SIA, with all the Shelby American (COBRA and S1MS 9424A), FORD (Firing order) and supplier identification markings removed.  This is consistent with the manifold.  That way they could sell without legal issues. The best way to determine if this was the actual origin, would be finding an old period sales flier or news print ad showing the generic intake.  It might have been a local speed shop and all the advertising is long go.  This of course is all conjecture.  We may never really know for sure.

However, this does not explain why the PCV provision was removed and an threaded hole added to the No. 8 runner.  Other than, if they started with the race version manifold, that provision was already gone.   Then, the threaded hole was added by the first owner to tap in a line for some vacuum.

Take care

Cory

[6s1640]

I did a Google search on 1965 early Cobra Intake manifold and found this image from Dan Case.  It looks like this may have been the manifold used to make the manifold I posted above. No need to remove the firing order or the Shelby American part number. Just remove the feature that cast the word COBRA.

See link below.  It is the same manifold.

https://www.saac.com/forum/index.php?topic=11325.0