66 GT350 S2MS Cobra Intake Manifold Variations

[Karguy]

I purchased a really nice #8 from a good friend about a year before 6s281 made its way back into my life in Jan 17. I knew that if I ever did get my car back it would need a manifold because I remembered one of the rear mounting ears had been broken off of the original years ago. This manifold has some sentimental value because my buddy I purchased it from has since passed away. After reading this post I realize it is probably the wrong intake for 6S281, sounds like I should have a #1.  What say you guys? I would appreciate a knowledgeable opinion and some good advice.
Thanks, Karl
6s281

[J_Speegle]

...................After reading this post I realize it is probably the wrong intake for 6S281, sounds like I should have a #1.  What say you guys? .......

Think it's early in the survey and discussion of findings but I think you might want a S1MS small Cobra one for you application given others I've seen and recorded. By the original post, though not the title,  the plan apparently was not to look at all intakes installed during production but just the S2MS variations.



As a side comment - Did notice that the S2MS version with the Thermactor and coil bosses were missing from this survey verses the last discussion.

[s2ms]

...................After reading this post I realize it is probably the wrong intake for 6S281, sounds like I should have a #1.  What say you guys? .......

Think it's early in the survey and discussion of findings but I think you might want a S1MS small Cobra one for you application given others I've seen and recorded. By the original post, though not the title,  the plan apparently was not to look at all intakes installed during production but just the S2MS variations.

As a side comment - Did notice that the S2MS version with the Thermactor and coil bosses were missing from this survey verses the last discussion.

Yes, I was just trying to focus on the standard 66 GT350 S2MS versions for this discussion, not anything rare like race versions, etc. Changed the title to reflect that. But...if you have an early car after #252 that has an original S1MS intake please post that info, may as well include those.

Jeff,

I did not include the version with thermactor and coil bosses because I was not aware they came on any 66 GT350.

Thanks for the replies so far. If you have an original intake please post the styles and car number and I'll add it to the spreadsheet, hopefully a clearer picture will emerge...

Thanks,
Dave

[6S280]

Karl, 6S280 has a combo set 1 (1A-2A-3A) manifold.

[Karguy]

Thanks Roger, good to hear from you. Possible to get pictures of your S1 intake? Ive always figured 280 is my best shot for correct specs for 281.
Thanks, Karl
6s281

[J_Speegle]

Thanks Roger, good to hear from you. Possible to get pictures of your S1 intake? Ive always figured 280 is my best shot for correct specs for 281.

Just a thought

Hard to tell what car was built the closest to your car especially with this subject since this was a Ford VIN related (since the intakes were installed by Ford) item. But guess since you can't get access to the Ford VIN for other cars with ease you'll have to settle for the Shelby VIN

[65fastbackk]

I don't have a car but I have a combo 3 manifold.

[CSX4781]

Hey Dave,
    The original intake to SFM6S1342 is a #3 combination. Also, even though it is a little bit later car, the casting/assembly dates for the original engine block are fairly early (early-mid October 1965).

Dave

[TJinSA]

I was able to examine the original engine from 6S264 today.  It is not absolutely known, but it was on the car when purchased in 1980, and odds are it is the original intake-- it's a 2A. Will update WRT firing order location later.

[jamesfee]

I'm not sure if I'd sent this info previously but...
1801 has 1A -2B combination (underside not accessible at present).
2021 had an aftermarket manifold (it was setup for B Prod SCCA) so it remains unknown.

j

[s2ms]

Thanks everyone for the continued replies, keep them coming!

James...yes, I have the info on 6S1801 from the previous survey.

Also, any very early non-carryover owners with original S1MS intakes please report those so we can include them.

[kingchief]

6S406 currently has an S1MS manifold.  Did it come with it from Shelby well I have no idea.  Before I had the car restored, photos from early 2000 [furnished by Cobra Automotive] reveal that she had the S1MS manifold. Carb is dated [List-3259] 552.  I shall leave this manifold on the car but I just wanted to indicate the possibility.  I just cannot definitively confirm that the car had the S1MS manifold from the factory.

Cheers,

Steve

[gt350hr]

   6S477 has the S2MS with a "full" A , not angled. P/N is on #8 runner and firing order ic on the "pad" in the back.  Two vacuum ports ,  It is original to the car.
      Randy

[s2ms]

   6S477 has the S2MS with a "full" A , not angled. P/N is on #8 runner and firing order ic on the "pad" in the back.  Two vacuum ports ,  It is original to the car.
      Randy

Thanks Randy!

6S406 currently has an S1MS manifold.  Did it come with it from Shelby well I have no idea.  Before I had the car restored, photos from early 2000 [furnished by Cobra Automotive] reveal that she had the S1MS manifold. Carb is dated [List-3259] 552.  I shall leave this manifold on the car but I just wanted to indicate the possibility.  I just cannot definitively confirm that the car had the S1MS manifold from the factory.

Cheers,
Steve

Thanks Steve, 6S406 seems too late for an original S1MS but who knows. Hopefully more early owners with OE S1MS intakes will post here so we can get an idea of the spread for those.

[GT350Lad]

   6S477 has the S2MS with a "full" A , not angled. P/N is on #8 runner and firing order ic on the "pad" in the back.  Two vacuum ports ,  It is original to the car.
      Randy

So we can say that early numbered cars up to 500 are having combo #1?
Cheers