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Old 11-13-2011, 10:48 PM
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1/2 Chevy Disc Brake....Hollander Conversion?

Gents,

I have a 1984 1/2 ton Chevy truck with 1" rotors up front. They have the 5x5 bolt pattern. Looking to get to a 5x4.75 bolt pattern.

Does anyone have access to a Hollander Interchange Manual that can then tell me if there is another rotor out there that will swap right out that has a 4.5x5 bolt circle? I heard through the grapevine that some GM vans might have a rotor with the small GM pattern that I am looking for.

Any help is greatly appreciated. Thanks. Brent

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Last edited by 31fordcoupe; 11-13-2011 at 10:57 PM.
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Old 11-20-2011, 06:50 AM
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Hollander will not tell you that info. And there are no rotors that I know of, i think Astro's are 5in as well.
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Old 11-20-2011, 09:19 AM
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82-92 Camaro / Firebird had a "RPO 1LE" option that included a 12" big brakes upgrade.

Quote:
Minch discovered that the Camaro and Caprice shared the same front bearing package and quickly adapted the Caprice's big 12-inch front disc brake rotors onto the Camaro's spindles to replace the spindly 11-inch rotors. This obscure brake swap became the genesis for what would eventually be known by its Regular Production Option code: RPO 1LE.
SSB2303AA1A

23030AA3L / 23030AA3R for slotted and drilled unidirectional versions

I'd suggest calling SSBC at 800-448-7722 to make sure of the rotor diameter, bearing, and seal specs ... as they don't have that information listed. They DO say that this rotor has a 5 on 4.75 bolt pattern.

Summit also lists all of these rotors as "available".
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Old 11-20-2011, 09:37 AM
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More info

As long as your truck is equipped with JB1 or JB3 brake option (Look at the Service Parts Identification sticker in the glovebox)

I beleive that your truck uses the same calipers, pads, and wheel bearings as an 87 Caprice.

NAPA #'s:

AE728AM Pads
242-2028, 242-2029 Calipers
BR6 Inner Cup & Cone
BR3 Outer Cup & Cone
19984 Seal

You can't use the NAPA rotors, however, as they only list the ones with the 5 on 5" bolt pattern.
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