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Old 09-12-2003, 12:50 PM   #1
mcmlxix
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Who has access to Hallonder books?

I am doing reserach on rear disc brakes and want to see what rotors and calipers will interchange.
I'm still looking, so far this is what I found on calipers:
calipers come from 79-85 El-Dorado, Riviera, and Toronado and 80-85 Seville
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Old 09-12-2003, 01:45 PM   #2
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Your caliper info is correct for those models. This is what Hollanders shows for rotors:

BLAZER S10/JIMMY S15 83-97 VIN model "T" (4x4)
BRAVADA 91-94
BRAVADA 96
ELDORADO 79-85
ELDORADO 79-85 rotor only (Brakes, Rear)
ISUZU HOMBRE 98-99 4x4
RIVIERA 79-85
RIVIERA 79-85 rotor only (Brakes, Rear)
S10/S15/SONOMA 83-93 4x4
S10/S15/SONOMA 94-97 VIN model "T" (4x4)
SEVILLE 80-85
SEVILLE 80-85 rotor only (Brakes, Rear)
SYCLONE 91
TORONADO 79-85
TORONADO 79-85 rotor only (Brakes, Rear)
TYPHOON 92-93


For info Hollanders shows these rear disc assemblies being interchangable:

BUICK 78 Electra, Limited and Park Avenue, disc
BUICK 78-80 LeSabre, disc
CADILLAC 77-79 disc
RIVIERA 77-78 disc
SEVILLE 77-79

I listed these because I thought the 78/79 Seville was the one everybody was looking for the convert GM 12 bolts to disc brakes. (I may be wrong). Hope this helps.
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Old 09-12-2003, 02:24 PM   #3
mcmlxix
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ok. but the rotors have the incorrect bolt pattern: 5x4.75 our trucks (5 lug) is 5x5. I am waiting to find out if I can use a stock rotor with the correct bolt pattern so rotors dont need to be machined.

If I can get an answer from some vendors on what rotors they use I will see what interchanges for that.
Thanks for the info so far.
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Old 09-12-2003, 04:15 PM   #4
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The 77-79 Seville etc. are 5 on 5 wheels. The 80-up is 5x4.75. I have not seen the specs but I would go to local parts store and have them pull a rear rotor for a 79 and 80 Seville and compare them to see if they are the same dimensions except for the bolt pattern.
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Old 09-12-2003, 06:48 PM   #5
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Hey while you are at it does the book say what PS brackets interchange for 67-72 6 cylinders?
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Old 09-12-2003, 09:14 PM   #6
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Hollanders dont list bracket interchange...only PS pump interchange.

Pretty much any pre-integeral head 250 six brackets off nova's, chevelles, impalas. etc will work.. and they are not hard to find around these parts.

The 77-79 seville rear rotors are the correct bolt pattern.... and there easy to find here too... there are 3 sets at the local yard around here too. I grabbed a set -up for myself for some future swap, with the seville calipers you can get an emergency rear brake that will work also.
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