ConcoursMustang Forums
Restoring - General discussions that span across many different groups of years and models => Suspension => Topic started by: Anghelrestorations on May 07, 2024, 12:48:03 PM
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Not sure if anyone has studied or looked at this before, but figured I would throw this out here. The original brake calipers that were used from 1968 to 1970 were a C8OZ-2B120-A (RH), and a C8OZ-2B121-A (LH). I always thought it was unusual that Ford would only have one vendor and one design of this caliper as everything I have seen has been a KH (Kelsey-Hayes) design. I dont think there is a Bendix front caliper unless I missed it.
I realize now that there is actually two different design original front brake calipers if you look closer - both are cast with the FoMoCo symbol and both stamped with what I think is a Kelsey Hayes date code. These two are both from original Jan/Feb 69 Shelbys and match their build dates so assume they are original to the cars. Curious if anyone has seen anything other than these designs during these years. The caliper pictured on the left that I call the tear drop design dated 020KH9 is by far the most common I have seen.
(https://live.staticflickr.com/65535/53705551138_de1f14513e_c.jpg) (https://flic.kr/p/2pPLZhf)20240505_185039 (https://flic.kr/p/2pPLZhf) by Marcus Anghel (https://www.flickr.com/photos/154714213@N02/), on Flickr
(https://live.staticflickr.com/65535/53705671199_1ea21fd675_c.jpg) (https://flic.kr/p/2pPMAYg)20240505_185140 (https://flic.kr/p/2pPMAYg) by Marcus Anghel (https://www.flickr.com/photos/154714213@N02/), on Flickr
(https://live.staticflickr.com/65535/53705337706_66c04992f8_c.jpg) (https://flic.kr/p/2pPKTQo)20240505_185122 (https://flic.kr/p/2pPKTQo) by Marcus Anghel (https://www.flickr.com/photos/154714213@N02/), on Flickr
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FYI at least on the 69/70 Shelby the front of the caliper received a quick brush of semigloss /flat paint across the street side. This was to conceal flash surface rust from showing through the spokes of the Shelby wheel. I have not seen evidence of that being done on magnums given they do not show the calipers in the same way.
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I believe these to be originals from my late Feb GT500. No revelation but perhaps date correlation useful in some way.
Adrian
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Thanks Bob...yes good point. My thought was to add that paint detail once the calipers were mounted on the car.
Adrian - do you see a FoMoCo stamping on those calipers as well?
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I?m pretty confident these hard to read marks are FoMoCo
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I noticed a couple additional markings. Both appear to have W2 cast just below the bleeders. And one caliper has a large number 3 stamped on it in the same general area.
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Not sure if anyone has studied or looked at this before, but figured I would throw this out here. The original brake calipers that were used from 1968 to 1970 were a C8OZ-2B120-A (RH), and a C8OZ-2B121-A (LH). I always thought it was unusual that Ford would only have one vendor and one design of this caliper as everything I have seen has been a KH (Kelsey-Hayes) design. I dont think there is a Bendix front caliper unless I missed it.
I realize now that there is actually two different design original front brake calipers if you look closer - both are cast with the FoMoCo symbol and both stamped with what I think is a Kelsey Hayes date code. These two are both from original Jan/Feb 69 Shelbys and match their build dates so assume they are original to the cars. Curious if anyone has seen anything other than these designs during these years. The caliper pictured on the left that I call the tear drop design dated 020KH9 is by far the most common I have seen.
(https://live.staticflickr.com/65535/53705551138_de1f14513e_c.jpg) (https://flic.kr/p/2pPLZhf)20240505_185039 (https://flic.kr/p/2pPLZhf) by Marcus Anghel (https://www.flickr.com/photos/154714213@N02/), on Flickr0240505_185140 (https://flic.kr/p/2pPMAYg) by Marcus Anghel (https://www.flickr.com/photos/154714213@N02/), on Flickr20240505_185122 (https://flic.kr/p/2pPKTQo) by Marcus Anghel (https://www.flickr.com/photos/154714213@N02/), on Flickr
I've only seen the one on the left. The one on the right is new to me.
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The low mileage (20k) '68 GT350 I've been working on had zinc plated front calipers, date coded correct for the car. Assumed they were original.
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I've only seen the one on the left. The one on the right is new to me.
Same for me.
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Thats what I have heard is that some of the early 68 cars may have had that finish on them or cad plating or some kind of silver finish on these calipers. Dont think I ever seen that on a 69 or 70.
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After further cleaning, the calipers from my 02/26/69 GT500 appear to be zinc plated with some remnant black paint on wheel facing side. Has zinc been seen much on 69 calipers before.
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It seems counter intuitive that there would be a need for the black out paint if the calipers were already protected from flash rust by the plating? That is unless some were and others weren't and they blacked them out regardless.
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Interesting. So from your build date and the Julian date code on the calipers I am seeing those were assembled just 12 days before the car was built. And does look like at least from this example we have zinc plated (or cad plated) into 1969 production from this example.
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Another seeming anamoly for a 69 model are the fine thread bolts and nuts on the tie rod sleeve clamps. It was my understanding zinc calipers and fine thread hardware on adjusting sleeves were not ofter or ever observed carry overs from 68 to 69.
Might these generally result in point deductions on a 69 model if unable to verify they were original.
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Another seeming anamoly for a 69 model are the fine thread bolts and nuts on the tie rod sleeve clamps. It was my understanding zinc calipers and fine thread hardware on adjusting sleeves were not ofter or ever observed carry overs from 68 to 69.
Might these generally result in point deductions on a 69 model if unable to verify they were original.
Two different things need two different answers. If you choose to use the plated calipers which is out of the ordinary first off save pictures like you have posted her and keep in a album to keep with the car to help judging team understand why you did what you did. If you do choose to go that way you will need to renew the finish on the calipers to appear as new and not a diminished finish as they appear now. Don't forget to black out the wheel side. Of course you can also use bare cast iron finish caliper like is typical. As far as the sleeves and hardware are concerned , the sleeves need to be gone over to remove plier marks or just replace with better condition . As far as the hardware I would replace with the typical as it will be a hard case to make that those fine thread and acorn nuts are original for your 69 car IMO .But that is just me. Of course it is your car and consequently it is your choices to make.
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I hate saying "+1", but Bobs comments are spot on. Thats exactly what I would say.
Bottom line is if you put anything on your car that is not typical better have documentation to prove thats how it was originally. Otherwise if/when you ever get the car judged will be an issue as we judge to the norm and not the exceptions.....unless documented.
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The NAPA store here will cad plate rebuilt calipers. I have to specify not plating them for me. They look nice that way but originals are not plated.
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Marcus
I have seen quite a few of the version pictured on the right but never any I an say came off original cars. I used to be able to go to parts store and have them bring in 20-30 rebuilts. I would sort through them and put aside the ones like on the right. I always assumed they were from later 70's
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Tim...yes, thats what I also assumed but looking at these two sets I have from these two cars they are both date stamped January 1969 which matches perfectly the build dates of the cars. So I have to think these are original assembly line units. And both stamped KH so assume they are made by Kelsey Hayes.
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Tear drop type calipers are more common but both types were used and are originals. I have nos and assembly line silver calipers and i thought ford wanted silver calipers on cars with mag type wheels but cant document that and i had nos out of the plant 67 shelby calipers that were silver and 67 shelbys had mag wheels.