Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: dragon slayer]
#2498746
05/21/18 07:34 PM
05/21/18 07:34 PM
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Joined: Jan 2003
Posts: 5,361 Rancho Cordova, California (Sa...
hemi71x
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Well, the 68 Hemi Dart's and Barracuda's did use the 4 1/2" inch bolt pattern, and 1/2" inch wheel studs, so you just might have rotors-hubs, from those cars. On the back side of the hubs are there the letters K/H cast in the hub? Where did you get them, anyway? An old racers stash of parts?
And, no 72 A Body car, ever got a 4 1/2" bolt pattern.
Someone just brought this to my attention. Possibly, you have Ford Mustang rotors, they are 4 1/2" inch bolt pattern. But i would need to see an official pair of early Mustang rotors and hubs, to compare.
I doubt a Ford two piece, rotor, hub, is machined to work on a Mopar spindle, (knuckle) or it would have been done long ago. Even though there is a vendor that re-machines one piece rotors, with 4 1/2" inch bolt pattern to work on a Mopar spindle.
Last edited by hemi71x; 05/22/18 10:44 AM.
RF-4C Phantom 69-370 Zweibrucken, Germany
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Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: dragon slayer]
#2499021
05/22/18 12:51 PM
05/22/18 12:51 PM
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hemi71x
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I haven't got a clue if Kelsey Hayes ever produced a rotor-hub assembly, back in 1972, with a 4 1/2" inch bolt pattern, for an A body automobile. It certainly wouldn't have been for any regular, assembly line, production, automobiles. Running off a batch of them, as replacement parts, for a 68 Superstocker, who knows. I doubt if anyone knows. I used to rebuild these Kelsey Hayes a body disc brake systems for resale purposes, and i kept track of all the ones that i rebuilt during the 12, 13 years that i was doing them. Rebuilt 32 sets of brakes in that time frame, and never came across anything with 4 1/2" inch bolt pattern, for a Mopar A body automobile. If you do have a 68 Superstock pair, they certainly would be dinosaur eggs, hens teeth, unobtanium parts, to have in this day and age. But a very, very, limited market for them if the rotors aren't machined undersize already. For street A body cars, the enthusiasts are just buying the one piece Mustang rotors for 4 1/2" bolt pattern machined for a Mopar, that a machinist, vendor, advertises on the web sites.
Last edited by hemi71x; 05/22/18 02:39 PM.
RF-4C Phantom 69-370 Zweibrucken, Germany
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Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: autoxcuda]
#2499112
05/22/18 04:05 PM
05/22/18 04:05 PM
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hemi71x
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The rotors were used in 66 trans am cars. Actually they were first developed for that or the Rally off road 63-65 A-bodies Scott Harvey and others campaigned.
Mopar in the mid 60’s had an over the counter performance parts listing/catalog. These disks may have been available even then in those list/catalogs. Humm, good to know. Thank's.
RF-4C Phantom 69-370 Zweibrucken, Germany
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Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: hemi71x]
#2499117
05/22/18 04:14 PM
05/22/18 04:14 PM
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autoxcuda
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The rotors were used in 66 trans am cars. Actually they were first developed for that or the Rally off road 63-65 A-bodies Scott Harvey and others campaigned.
Mopar in the mid 60’s had an over the counter performance parts listing/catalog. These disks may have been available even then in those list/catalogs. Humm, good to know. Thank's. I’m not sure if they were available over the counter. I have a 65 or 66 Performance Parts list from a Super Stock magazine or something. I have to check it tonight. Not sure if there are scans of those list available online.
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Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: dragon slayer]
#2499202
05/22/18 08:30 PM
05/22/18 08:30 PM
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dragon slayer
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Here are the back pictures and there was a number on the rotor. If the Dorman Catalog is correct the studs in these, and they seemed to be original are a 1972 stud. Cross to a 3580598 Chrysler part number. Which some dealer have listed incorrectly as a rear stud.
I also noticed that the casting symbol after the rotor number looks like a casting symbol I have seen on the 90425 KH type Pin Caliper Brackets.
Last edited by dragon slayer; 05/22/18 08:32 PM.
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Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: hemi71x]
#2499320
05/23/18 01:44 AM
05/23/18 01:44 AM
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hemi71x
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The Mustang rotors did not look like that and were one-piece. Then it's pretty much a given that he has a pair of 68 Hemi Dart, Barracuda rotors & hubs. All the 4 "inch bolt pattern, 65-72 Kelsey Hayes, 4 piston caliper, disc brake systems, that i have worked on, have the letters K/H cast into the back side of the hub. I see the letters DSK on the hub in the picture. Meaning Disc? To me, i feel that is manufacturing ID for those special 4 1/2" bolt pattern hubs. What are your intentions for those rotors & hubs? You got yourself a Superstock car? I'm not a buyer or anything like that, but your posting peaked my interest. I have heard of those rotors & hubs, but never have seen any in person, or pictures of them before this. Thank's for sharing.
Last edited by hemi71x; 05/23/18 01:45 AM.
RF-4C Phantom 69-370 Zweibrucken, Germany
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Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: dragon slayer]
#2499366
05/23/18 09:46 AM
05/23/18 09:46 AM
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Posts: 20,185 PA.
pittsburghracer
"Little"John
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"Little"John
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I forget the company but they used to have a jig for drilling the old KH rotors so you could run a 4 1/2 inch bolt pattern. We looked into it and hit a dead-end and ended up having his done locally. Worked out great for him and he updated his OLD centerline wheels. 23023734_10155737519032777_1329839039_n by John Cadamore, on Flickr
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: A Body Disc Brake Anomlie with 4.5" bolt pattern??
[Re: dragon slayer]
#2499367
05/23/18 09:47 AM
05/23/18 09:47 AM
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Joined: Jan 2003
Posts: 27,471 So Cal
autoxcuda
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Thank you for sharing the pictures and info. Really neat to see these up close out of a car.
Could you measure the register diameter at the bottom where the wheel sits ?
I’ve never measured, I thought it was probably b-body register. But never had clarification.
Last edited by autoxcuda; 05/23/18 09:49 AM.
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