Researching GT500 smog belt--NO a/c ? ?

[68blk500c]

I'm familiar with the GT500 smog belt used with a/c, however I am trying to find out what belt was used in the factory application without a/c.  My final version of the Ford MPC doesn't list one.  What about the first version?  Might someone have an original example?
Interested in your knowledge/experience with this application.

Thanks for your input.
Don

[Coralsnake]

I think the pulleys are the same as a Cobra Jet car. That might be our clue

[68blk500c]

Since there seems to be broader knowledge of CJ engines, let's go with that, in either Mustang or Shelby.

[Coralsnake]

I think the ID number is C5OE-8620-A

[Bob Gaines]

 From the Cobra Jet Forum  https://www.428cobrajet.org/id-belts .

[Coralsnake]

Since the CJ predates the 68 intro, I'm thinking its actually from the GT500

[Special Ed]

68 used the smaller water pump pulley c80e. that used the shorter c5 belt 69 starterd with the bigger scj c8ae water pump pulley that the longer c6oe-b belt and was used after a feb 69 date on late cjs and some 70 scj. - cj cars.  I have seen many wrong length smog belts used on 68-70 cj scj cars and a good way to tell is look at the smog pump adjuster bolt as it should be in the center of the adjustment bracket when the correct belt is installed.

[68blk500c]

Ok, let me be more forthcoming about my research/question.  I purchased a box of NOS FoMoCo belts several years ago at a swap meet.  In the bunch are two belts of quite different sizes with the SAME engineering number.  Both are C8ZE-8620-C.  Yes, I know what that application is: CJ thermactor with A/C.  The one belt is indeed that, marked with DF, dated 367.

The other belt (identical #) is marked AY, dated 367. and has the same specifications as the C5OE-A non-A/C smog version; it is quite a bit shorter and the width is slightly different.

Why Ford would produce two service belts for similar applications with the same engineering number is a mystery.  I believe the shorter belt is a correct service belt for a non-A/C smog CJ engine.  I was hoping someone else had run into this before, to help validate my theory.

 

[rockhouse66]

Just for fun, here is an original KR w/o A/C smog belt.  Looks like C5DE to me but could be C5OE maybe.

[68blk500c]

I read yours as a D, plus the suffix is C1.  Haven't looked it up, yet.

[Coralsnake]

Oh I like that.  I do seem to recall an odd prefix -that's probably it.

[Special Ed]

The 2 smog belt  ford service # is jb 346  short and jb354 long if i remember correctly.

[68blk500c]

Ed, what do the AY and DF indicate?  Is that the V-shape for the specific sheeve of the pulley?